Cardiac Physiology Interview Questions & Answers

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About this NHS interview question bank

To prepare for a cardiac physiology NHS interview, expect questions on recognising and escalating urgent ECG findings, exercise tolerance testing safety and stopping criteria, pacemaker and ICD follow-up, ambulatory monitoring, echo and cath lab work, and how you explain results to patients without going beyond your scope. Build short spoken answers around real moments from your training or practice, and know your registration body (RCCP or AHCS), the SCST guidance relevant to your work and the NHS values before you walk in.

This bank contains 40 original practice questions with first-person model answers written for cardiac physiologists applying for Band 5 posts, including Practitioner Training Programme graduates, with a selection pitched at Band 6 and stepping up towards Band 7. It covers non-invasive testing, exercise testing, ambulatory monitoring, echocardiography, cardiac devices, remote monitoring and the cath lab, and each answer is built around a realistic, non-identifying scenario. Every question explains what the panel is really assessing, the points you must hit, the mistakes to avoid and the frameworks worth reading, so you can practise answers that sound like you rather than a textbook.

 

What this question bank covers

• Motivation for cardiac physiology
• NHS values in diagnostic services
• Recording 12-lead ECGs and recognising urgent abnormalities
• STEMI and complete heart block escalation
• Exercise tolerance testing safety and stopping criteria
• Patient collapse during a test
• Chaperones, dignity and consent
• Communicating results within scope
• Ambulatory ECG and blood pressure monitoring
• Echocardiography principles and reporting limits
• Cath lab roles and haemodynamic monitoring
• Pacemaker and ICD checks
• Remote device monitoring
• ICD deactivation at end of life
• Infection prevention and control
• Safeguarding adults and children
• Equality and reasonable adjustments
• Confidentiality and record keeping
• Incidents, PSIRF and Duty of Candour
• Leadership and supervising trainees
• RCCP and AHCS registration
• CPD and accreditation
• Resilience and wellbeing

 

40 NHS interview questions with full model answers. The first 8 are free to read below. Unlock the remaining 32 for £2.99 (12 months' access).

These are original practice questions written to reflect how NHS interviews are run. They are not leaked or official questions, and Healthcare Interview Prep is independent of the NHS.

 

 

Free NHS interview questions and model answers

 

 

Question 1: Why do you want to work as a cardiac physiologist?

Motivation question  ·  Motivation

 

What the interview panel is assessing

The panel wants a genuine, personal reason for choosing cardiac physiology rather than another healthcare career. They are listening for an understanding of what the job really involves day to day, including the patient contact, the technical precision and the responsibility of spotting something urgent.

 

Model answer

Honestly, I found cardiac physiology a bit by accident. I was doing a general science degree and spent a week shadowing in a hospital, and on the second morning I was put with a physiologist running an exercise tolerance test. A man in his fifties was walking on the treadmill, chatting away, and she was watching his ECG, his blood pressure and his face all at the same time. About eight minutes in she quietly slowed the belt, sat him down and called the registrar, because his ST segments had changed and he'd gone a bit grey. He was fine, and he went on to have the right treatment, but I remember thinking she'd just made the most important decision of that man's week, calmly, in about ten seconds.

That mix is what pulls me in. It's a very technical job, you have to understand the physiology and the equipment properly, but almost every test has a person in front of you who's anxious about their heart. I like that I get proper time with patients, explaining what's happening, putting electrodes on, keeping them comfortable, and then I also get to look carefully at the data and think.

Through my practitioner training I've done ECGs on wards and in outpatients, Holter fitting and analysis, exercise tests, and time in pacing clinic and the cath lab. Devices have probably excited me most, but what I value across all of it is that we're often the first person to see that something is seriously wrong, and the job is to recognise it and get the right help quickly. I want to be the physiologist a patient feels safe with and a cardiologist trusts.

 

Why this answer works

The answer opens with a vivid, specific moment rather than a general statement, which makes it memorable and believable. It shows a realistic picture of the job, balancing technical skill with patient care, and it names the escalation responsibility that panels care about.

 

Key points to include

• A real moment that drew you to cardiac physiology
• Understanding of the balance between technical skill and patient contact
• Awareness of the range of work, from ECGs to devices and the cath lab
• Recognition that you are often first to spot something urgent
• What kind of physiologist you want to be

 

Common mistakes to avoid

• Saying you just enjoy technology or physics without mentioning patients
• Describing it as a stepping stone to medicine
• Giving a generic healthcare answer that could fit any profession
• Overstating your experience or clinical decision-making authority

 

NHS values and standards

Compassion; Commitment to quality of care; Improving lives

 

Further reading

• Society for Cardiological Science and Technology (SCST) information on cardiac physiology careers
• National School of Healthcare Science: Practitioner Training Programme overview
• NHS Constitution for England

 

 

Question 2: You are recording a routine 12-lead ECG in an outpatient clinic and you see ST elevation consistent with an acute STEMI. What do you do?

Clinical Scenario question  ·  Clinical Scenario

 

What the interview panel is assessing

The panel is testing whether you recognise a time-critical finding and act on it immediately and safely. They want to hear that you stay with the patient, get help fast through the right local pathway, and do not delay treatment by worrying about whether it is your place to escalate.

 

Model answer

The first thing is that I wouldn't let the patient leave or walk anywhere, and I wouldn't leave them alone. I'd keep my voice calm, because they may have come in for what they thought was a routine check, and I'd ask straight away how they're feeling. Have they got chest pain now, breathlessness, sweating, nausea? Their answer shapes how fast everything else happens, but either way this is an emergency until a doctor says otherwise.

I'd quickly make sure the trace is real. A quick look at lead placement and the limb leads, but I'd only take seconds over it. I wouldn't strip the patient down to repeat everything before getting help. I'd press the call bell or ask a colleague to get help while I stay, and escalate through our department's urgent findings route. In a hospital outpatient setting that usually means getting the on-call cardiology team or medical emergency team to the patient immediately, and following the local primary PCI pathway. If I were in a community diagnostic setting without doctors on site, it would mean calling 999, because the patient needs the heart attack centre, not a referral letter.

While help comes I'd keep the patient lying or sitting comfortably, keep them on the monitor if we have one, make sure the resus trolley and defibrillator are close, and repeat the ECG if their symptoms change. I'd have any previous ECG ready to compare, because that helps the doctor decide quickly. The ECG must be properly labelled with the patient's details, date and time.

Once the patient is handed over, I'd document what I saw, the time I escalated and who I handed to. I'd also tell the senior physiologist on shift so the clinic list can be managed. I know my role is to recognise and escalate, not to diagnose or decide treatment, but with ST elevation the worst thing I could do is wait.

 

Why this answer works

This answer puts patient safety first and shows urgency without panic. It distinguishes between hospital and community settings, which shows real understanding of pathways, and it is clear about scope: recognise, escalate, support, document, rather than diagnose.

 

Key points to include

• Stay with the patient and assess symptoms immediately
• Brief check that the trace is genuine without delaying help
• Escalate urgently via the local STEMI or primary PCI pathway or 999 in community settings
• Have resuscitation equipment nearby and previous ECGs ready
• Accurate labelling, documentation and handover

 

Common mistakes to avoid

• Sending the patient back to the waiting room or to their GP with the ECG
• Spending several minutes repeating and perfecting the trace before getting help
• Telling the patient they are having a heart attack in an alarming way
• Forgetting to document times and who the patient was handed to

 

NHS values and standards

Commitment to quality of care; Compassion; Working together for patients; AHCS Standards of Proficiency / RCCP standards

 

Further reading

• SCST clinical guidelines for recording a standard 12-lead electrocardiogram
• NICE guidance on acute coronary syndromes
• Resuscitation Council UK guidelines
• Local urgent ECG findings and primary PCI pathway policy

 

 

Question 3: Which of the NHS values means the most to you in cardiac physiology, and how have you shown it?

NHS Values question  ·  NHS Values

 

What the interview panel is assessing

The panel is checking that you know the NHS values and can link one to real behaviour in a physiology department. They want an example, not a recited list, and some sense of why that value matters in a diagnostic service.

 

Model answer

The six values are working together for patients, respect and dignity, commitment to quality of care, compassion, improving lives, and everyone counts. The one I come back to most is commitment to quality of care, because in our job quality is very concrete. A badly placed chest lead, a noisy trace or a Holter diary that isn't filled in can mean a wrong conclusion, a repeat appointment or something important being missed.

An example from my training: I was doing inpatient ECGs on a medical ward and noticed that a lot of the serial ECGs on one patient looked different from each other, with changes in the chest leads that didn't really fit his story. When I looked closely it was clearly lead placement varying between recordings, with V1 and V2 too high. The doctors were starting to wonder about new changes. I repeated it carefully, marked the electrode positions with the patient's permission so the next recording would match, and told the nurse in charge and the junior doctor why the earlier ones differed.

Afterwards, with my supervisor's support, I spent ten minutes with the ward's healthcare assistants showing them the landmarks we use, finding the fourth intercostal space by counting down from the angle of Louis. They were really receptive, and it didn't feel like criticism because we were all trying to get it right for the patient.

What that taught me is that quality isn't just about doing my own test well. It's about noticing where things are going wrong around me and helping fix them in a way that people can take on board. That matters because people make decisions about chest pain, medication and procedures based on what we record.

 

Why this answer works

The answer names the values accurately and then quickly moves to a specific, role-relevant example. It shows attention to detail, practical problem-solving and a collaborative way of improving quality, all of which matter in a physiology service.

 

Key points to include

• Name the values briefly and accurately
• Choose one and explain why it matters in cardiac physiology
• Give a specific example from training or practice
• Show the impact on the patient and the team
• Reflect on what you learned

 

Common mistakes to avoid

• Reciting all six values with no example
• Choosing a value but describing something unrelated to it
• Making the example about a colleague's failings in a judgemental way
• Claiming credit for a change you did not lead

 

NHS values and standards

Commitment to quality of care; Working together for patients; Improving lives

 

Further reading

• NHS Constitution for England
• SCST clinical guidelines for recording a standard 12-lead electrocardiogram
• Academy for Healthcare Science Good Scientific Practice

 

 

Question 4: A patient asks you straight after their echo or ECG, 'Is my heart OK?' How do you respond?

Communication question  ·  Communication

 

What the interview panel is assessing

The panel wants to see that you understand the limits of your role in giving results while still being kind and honest. They are listening for how you avoid false reassurance or alarming the patient, and how you make sure they know what happens next.

 

Model answer

This happens all the time, and I completely understand why. People have often waited weeks for the test and they're lying there watching me look at the screen. So I never want to brush them off, but I also need to be honest that I'm not the right person to give them a final answer.

What I'd usually say is something like, the pictures are saved and I've got everything I need from today, but the full report has to be checked and put together with everything else your doctor knows about you, so they're the right person to explain what it means for you. Then I tell them practically what happens next, whether the report goes to their GP or to the cardiology clinic, roughly how long that usually takes in our department, and who to contact if they haven't heard.

I think it's important I don't give false reassurance. If I said everything looks fine and the reporting cardiologist later found something, that patient would lose trust in all of us. Equally I wouldn't say anything that sounds alarming, and I'm careful with my face and body language while I'm scanning, because patients read that.

There are some exceptions within scope. If a test is clearly normal and our department's policy allows physiologists to tell patients that, I'd follow that policy. And if I've found something urgent, the patient won't be going home without being seen, so the conversation becomes, I'd like one of the doctors to have a look at you before you leave, which I'd say calmly and then escalate straight away.

Finally, I'd always check whether they have symptoms right now and give them the usual advice about what to do if they get chest pain or collapse while they're waiting, because sometimes that question comes from someone who's genuinely worried about how they feel today.

 

Why this answer works

This answer balances kindness with professional limits and gives the patient something concrete to hold on to. It shows awareness of how body language affects patients, mentions local policy rather than assuming, and covers the safety net of urgent findings and safety-netting advice.

 

Key points to include

• Acknowledge the patient's worry rather than deflecting
• Be honest that the full result comes from the reporting clinician
• Explain clearly what happens next and the expected timescale
• Avoid false reassurance and alarming body language
• Follow local policy and escalate urgent findings straight away

 

Common mistakes to avoid

• Telling the patient everything looks normal when you are not qualified to say so
• Giving a vague 'the doctor will tell you' with no next steps
• Revealing worry through facial expression or comments to a colleague in the room
• Forgetting safety-netting advice about new symptoms

 

NHS values and standards

Respect and dignity; Compassion; Commitment to quality of care; AHCS Standards of Proficiency / RCCP standards

 

Further reading

• Academy for Healthcare Science Good Scientific Practice
• Local departmental policy on communicating results
• British Society of Echocardiography guidance on reporting and scope of practice

 

 

Question 5: Talk us through how you would run an exercise tolerance test safely, including when you would stop the test.

Clinical Scenario question  ·  Clinical Scenario

 

What the interview panel is assessing

The panel is checking that you understand exercise testing as a potentially risky procedure and can describe the safety steps before, during and after. They want to hear recognised stopping criteria described sensibly, and that you follow the local protocol and escalate rather than pushing on.

 

Model answer

I'd think of it in three stages. Before the test I'd confirm the patient's identity and the referral, check the reason for the test and make sure it's still appropriate. I'd ask about current symptoms, especially chest pain at rest, recent worsening or fainting, and check for contraindications in our protocol, things like a suspected acute coronary syndrome, uncontrolled arrhythmia, or severe symptomatic aortic stenosis. I'd look at the resting ECG and blood pressure, check medication instructions have been followed, and gain informed consent, explaining that they can ask to stop at any time. I'd check the resus trolley and defibrillator that morning and know who my medical support is.

During the test I'm watching three things together: the ECG, the blood pressure and the patient themselves. I'd keep asking how they feel and use a symptom or exertion scale. The test should stop if the patient asks to stop, which they're always entitled to. It should also stop for significant chest pain that's building, a fall in systolic blood pressure despite increasing workload, sustained ventricular tachycardia or other significant arrhythmia, new high-grade heart block, ST elevation in leads without Q waves, signs of poor perfusion like pallor, confusion or unsteadiness, or if I can't monitor the ECG or blood pressure reliably. There are also relative criteria, like marked ST depression or a very high blood pressure response, and I'd follow our protocol's exact thresholds and talk with the supervising doctor.

Recovery matters just as much. Some changes appear after exercise, so I'd keep monitoring until the ECG, heart rate, blood pressure and symptoms are back near baseline, and I wouldn't send someone off who still has changes or pain.

If anything worrying happened, I'd escalate straight away to the doctor covering the list, document clearly, and the patient wouldn't leave until they'd been reviewed. I'm very clear that my job is to keep the test safe, not to get a target heart rate at any cost.

 

Why this answer works

A structured before, during and after answer shows organised, safe thinking. It names realistic stopping criteria without inventing precise numbers, defers to the local protocol, and stresses the recovery phase and escalation, which are often forgotten.

 

Key points to include

• Pre-test checks: identity, indication, symptoms, contraindications, consent, emergency equipment
• Monitor ECG, blood pressure and the patient together throughout
• Recognised absolute and relative stopping criteria, applied per local protocol
• Continue monitoring through recovery until back near baseline
• Escalate concerns and document clearly

 

Common mistakes to avoid

• Focusing only on achieving target heart rate
• Forgetting that the patient can ask to stop at any time
• Not mentioning recovery monitoring
• Quoting thresholds you are unsure of rather than referring to local protocol

 

NHS values and standards

Commitment to quality of care; Respect and dignity; Working together for patients; AHCS Standards of Proficiency / RCCP standards

 

Further reading

• SCST guidance on exercise tolerance testing
• Local exercise tolerance testing protocol and standard operating procedure
• Resuscitation Council UK guidelines
• NICE guidance on recent-onset chest pain of suspected cardiac origin

 

 

Question 6: Recording a 12-lead ECG can feel intimate for patients. How do you protect their dignity, and how do you approach chaperones?

Communication question  ·  Communication

 

What the interview panel is assessing

The panel wants to know that you treat the ECG as an intimate procedure, gain proper consent and offer a chaperone in line with policy. They are also checking you can adapt to individual needs, such as cultural or religious preferences, past trauma or a request for a same-gender practitioner.

 

Model answer

I think it's easy for us to forget how exposing an ECG feels because we do so many. For the patient, a stranger is asking them to take their top off and is placing electrodes around and under the breast. So I treat it as an intimate procedure every time.

Before anything, I introduce myself, explain what the test is and exactly what I'll need to do, including that I'll need to place some stickers on the chest and, for some people, under the breast. I ask for their consent and offer a chaperone in line with our trust policy. I make it a genuine offer, not a box to tick, and I mention whether a same-gender colleague is available if they'd prefer. If they decline, I respect that and document the offer and their answer according to local policy. If I feel a chaperone is needed for my own protection or because of the situation, I'd arrange one or rebook rather than go ahead.

Practically, I use the curtain or a closed room, give them a gown or a sheet, and only uncover the area I need for as short a time as possible. For electrodes under the breast I explain why, and often ask the patient if they'd like to lift the breast themselves. I keep talking them through it so nothing is a surprise.

I also watch for anyone who seems particularly distressed. Some people have experienced trauma, and a few minutes extra, a chaperone, or letting them stay partly covered can make a big difference. On a ward I'd make sure the curtains are properly closed, which isn't always the case in a busy bay.

If someone told me they couldn't have a man or a woman do the test for religious or personal reasons, I'd try to accommodate it, and if that wasn't possible quickly, I'd discuss it with them and with the clinician, especially if the ECG is urgent.

 

Why this answer works

The answer recognises the ECG as an intimate procedure and covers consent, a genuine chaperone offer, documentation and practical dignity measures. It shows sensitivity to trauma, culture and gender preferences while keeping clinical urgency in view.

 

Key points to include

• Explain the procedure fully and gain consent before starting
• Offer a chaperone in line with trust policy and document the offer and response
• Use privacy, gowns and minimal exposure
• Adapt for cultural, religious or trauma-related needs
• Balance preferences against clinical urgency

 

Common mistakes to avoid

• Treating the ECG as too routine to need consent or explanation
• Offering a chaperone in a way that discourages acceptance
• Leaving curtains open or the patient exposed longer than needed
• Placing electrodes under the breast without explaining or asking first

 

NHS values and standards

Respect and dignity; Compassion; Everyone counts; AHCS Standards of Proficiency / RCCP standards

 

Further reading

• SCST clinical guidelines for recording a standard 12-lead electrocardiogram
• Local trust chaperone policy
• Equality Act 2010
• Academy for Healthcare Science Good Scientific Practice

 

 

Question 7: A patient collapses during a test in your department. Talk us through what you would do.

Patient Safety question  ·  Patient Safety

 

What the interview panel is assessing

The panel is testing whether you can respond calmly to a cardiac arrest or collapse, follow resuscitation principles and work within a team. They want to see that you know your local emergency procedures and that your physiology skills, such as rhythm recognition, are used to help rather than delay basic life support.

 

Model answer

Let's say I'm doing an exercise test and the patient suddenly becomes unsteady and goes down. My first job is to keep them safe, so I'd stop the treadmill and help them to the floor or the couch rather than let them fall. Then I'd follow the Resuscitation Council approach I'm trained in: check for danger, check responsiveness and, if they're not responding, shout for help, open the airway and check for normal breathing.

If they aren't breathing normally, I'd make sure someone pulls the emergency buzzer and the cardiac arrest call goes out through 2222, or 999 if we're in a community site, and I'd start chest compressions straight away. Because they're already on the ECG, I'll have an idea of the rhythm, and if it's VF or pulseless VT, getting the defibrillator on and following the shockable rhythm algorithm quickly is key. But I wouldn't let the monitor distract me from starting compressions.

If they're breathing but unresponsive or very unwell, I'd put them in a safe position, keep them monitored, take a blood pressure, record a 12-lead if I can, and get urgent medical help.

When the arrest team arrives I'd give a clear, short handover: what test they were doing, what happened, the rhythm, what's been done and when. I'd then take whatever role the team leader gives me, perhaps doing compressions, managing the defibrillator, or recording times. Afterwards I'd make sure the patient's data from the test is saved, because the doctors will want it, and complete an incident report as per policy.

I'd also check on colleagues and other patients who may have seen it, and take part in the debrief. I've been in one emergency during training and I remember my hands shaking afterwards, so I know how important that debrief is.

 

Why this answer works

This answer follows a recognised resuscitation sequence while showing the extra value a physiologist brings through rhythm recognition. It includes calling for help, clear handover, documentation, incident reporting and care for colleagues, which show maturity.

 

Key points to include

• Make the patient safe and follow Resuscitation Council UK basic life support
• Call for help via the local emergency number promptly
• Start compressions without delay and use the defibrillator for shockable rhythms
• Give a clear structured handover to the arrest team
• Save test data, document, report and attend the debrief

 

Common mistakes to avoid

• Staring at the monitor rather than assessing and starting CPR
• Forgetting to call for help early
• Not knowing the local emergency number or location of the defibrillator
• Leaving out documentation and the debrief

 

NHS values and standards

Commitment to quality of care; Working together for patients; Compassion

 

Further reading

• Resuscitation Council UK adult basic and advanced life support guidelines
• Local resuscitation and medical emergency policy
• Patient Safety Incident Response Framework (PSIRF)

 

 

Question 8: Cardiac physiologists are not regulated by the HCPC. How do you understand professional registration, and how do you keep yourself up to date?

Professional Development question  ·  Professional Development

 

What the interview panel is assessing

The panel wants to see that you understand the regulatory landscape for practitioner-level physiologists and take professional accountability seriously. They also want evidence that you plan your continuing professional development rather than just attending what comes along.

 

Model answer

It's a fair question because it confuses people. Clinical scientists are statutorily regulated by the HCPC, but cardiac physiologists at practitioner level aren't. Instead we register on a voluntary register, either with the Registration Council for Clinical Physiologists or with the Academy for Healthcare Science. Both of those registers are accredited by the Professional Standards Authority, which gives patients and employers some assurance about standards.

For me, voluntary doesn't mean optional in practice. Many employers expect or require it as a condition of the job, and more importantly it commits me to the same things a statutory register would: working within my competence, putting patients first, keeping my knowledge current, raising concerns and being honest when things go wrong. As a graduate of the Practitioner Training Programme, I'm registering with the AHCS, and I'd keep my registration and renewal up to date and know what the standards ask of me.

On CPD, I try to keep a simple plan linked to my appraisal. At the moment I'm interested in devices, so I keep a log of the device checks I do, reflect on any that were unusual, attend in-house teaching, and I've started working through learning for the relevant pacing accreditation. I'm also a member of the Society for Cardiological Science and Technology, which is our professional body, so I can use their guidelines and events.

I write short reflections when something teaches me something, for example a Holter where I missed a short run of an arrhythmia that my senior picked up. That reflection changed how I scroll through full disclosure, which is the real point of CPD: it should change what I do with the next patient.

 

Why this answer works

The answer gets the regulatory facts right without overcomplicating them, and shows a professional attitude to voluntary registration. The CPD section is specific, planned and linked to practice, with a believable reflection that shows learning from a near-miss.

 

Key points to include

• Clinical scientists are HCPC-regulated; practitioner physiologists use voluntary registers
• RCCP and AHCS registers, accredited by the Professional Standards Authority
• Treat voluntary registration as a professional commitment
• A planned CPD approach linked to appraisal and career interests
• Reflective practice that changes what you do

 

Common mistakes to avoid

• Claiming cardiac physiologists are HCPC registered
• Dismissing registration as optional and unimportant
• Describing CPD as only mandatory training
• Listing courses without saying what changed in your practice

 

NHS values and standards

Commitment to quality of care; Improving lives; AHCS Standards of Proficiency / RCCP standards

 

Further reading

• Academy for Healthcare Science Good Scientific Practice and Standards of Proficiency
• Registration Council for Clinical Physiologists registration standards
• Professional Standards Authority Accredited Registers programme
• Society for Cardiological Science and Technology guidelines

 

 

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