My father, whom I lovingly call Nana, lived for several years after a stroke. I have written about him before - the teacher, the love of mathematics and music, and the person I miss.

There is another part of that story: surgery, rehabilitation, the financial burden, the trauma, and the effort of caring for someone over years. Those years ran through the COVID period too. His loss, and what our family lived through, are part of why I want to write this series.

I want to begin with something basic. Heart attack, stroke, cardiac arrest. What do these words actually mean?

If someone may be having an emergency now

Call 112 in India. Ask for medical emergency help. Do not wait to finish this article or identify the exact condition. The National Portal of India lists 112 for integrated emergency help, including health services. If you already know your state’s verified emergency ambulance number, use it; in Maharashtra, that is 108. You do not need to settle the terminology before calling.

  • Possible heart attack:

    new or unexplained chest pressure, tightness, pain or discomfort needs urgent assessment. Discomfort in one or both arms, shoulders, neck, jaw, back or upper abdomen can also be a warning sign, especially with breathlessness, sweating, nausea or light-headedness. Do not wait for severe pain or every symptom, and do not drive yourself. AHA warning signs, NHS emergency advice.

  • Possible stroke:

    sudden face drooping; weakness or numbness of the face, arm or leg, especially on one side; confusion or difficulty speaking or understanding speech; vision loss; balance problems; or a severe unexplained headache can be warning signs. Call even if they disappear. Record when the person was last known to be well, without delaying help. Do not give food, drink or oral medicines unless a qualified emergency professional directs you. ICMR stroke workflow, Stroke Foundation.

  • Possible cardiac arrest in an adult:

    if the adult does not respond when called and gently tapped on the shoulder, and is not breathing normally (including only gasping), call on speakerphone and start CPR immediately. A firm, flat surface with the person on their back is preferred when feasible, but do not delay compressions to move them. Push hard and fast in the centre of the chest, at least 5 cm (about 2 inches) deep, while avoiding depths greater than 6 cm, at 100-120 compressions a minute. Allow the chest to rise fully between compressions. An untrained rescuer can give continuous chest compressions while following dispatcher guidance. Ask someone to bring an AED and follow its prompts. Do not delay for a lay pulse check. AHA 2025 adult basic life support, Red Cross: checking responsiveness.

Tell the call handler where you are: the address or village/locality, district, a nearby landmark and a callback number. Describe what happened, whether the person responds and whether they are breathing normally. Share when the symptoms began or when they were last known to be well, when the change was noticed, and any uncertainty. Stay with the person and follow emergency-service instructions. These signs are not a complete checklist that can rule an emergency out.

First response in India

112: call for medical help

Possible heart attack

Chest, arm, jaw or upper abdominal discomfort. Urgent help. Do not self-drive.

Possible stroke

Sudden arm / leg weakness or numbness, often one-sided. Last known well; no oral intake unless emergency staff direct.

Unresponsive adult + absent / abnormal breathing

CPR + AED. 100-120/min. At least 5 cm; avoid >6 cm. Firm, flat surface preferred. Do not delay CPR to move. Gasping is not normal.

108 availability varies locally.

Conceptual illustration: selected warning cues and a response overview, not a diagnostic checklist. Full symptoms, CPR instructions and qualifications are in the emergency guidance above. Do not delay help to verify a second phone number. Read the full explanation.

Three words, three different problems

In a family conversation, we may hear “heart attack”, “brain stroke”, “paralysis” or simply “BP problem”. We may understand that something serious happened without knowing exactly what the word describes.

BP means blood pressure. That phrase alone does not tell us which emergency, if any, is occurring.

But the distinction matters. The organ involved, the immediate problem and the response can differ. A person having a heart attack may still be talking. Someone having a stroke may be awake but unable to speak normally. Cardiac arrest requires an immediate resuscitation response. AHA comparison, ASA warning signs.

Heart attack

The central problem
Part of the heart muscle is injured because its oxygen supply is inadequate.
What a bystander needs to recognise
Possible symptoms need emergency assessment; the person may remain conscious.

Stroke

The central problem
Brain tissue is threatened or injured by an obstructed blood supply or bleeding.
What a bystander needs to recognise
Sudden neurological changes need emergency assessment, even if they settle.

Cardiac arrest

The central problem
The heart is no longer providing effective circulation.
What a bystander needs to recognise
An unresponsive adult who is not breathing normally needs immediate CPR/AED response.

This is an orientation, not a home diagnostic tool. These events can also occur together. The distinction helps us describe what is happening while we seek help.

Getting to emergency care in India

First, a practical point about the phone numbers. The National Health Mission describes 108 primarily as an emergency-response service and 102 mainly as patient transport for pregnant women and children. They are not interchangeable numbers for every situation. The state-specific service matters; 112 remains the national integrated emergency contact listed above. Ambulance availability and hospital capabilities vary by state and locality.

At a hospital, ask for Emergency or Casualty, rather than waiting for a routine OPD appointment. OPD means the outpatient department. For example, AIIMS Bhubaneswar describes Emergency Medicine/Casualty as a round-the-clock service. That is a description of its service, not a promise about every hospital.

The right destination also depends on what care is available. The ICMR stroke workflow includes rapid referral to a district hospital with CT or a stroke centre. That is a pathway for healthcare teams to organise. Tell the ambulance or receiving emergency team about a suspected stroke or heart attack and ask where to go; do not assume every nearby clinic has the facilities needed.

If an ambulance cannot be reached promptly, tell the emergency service or a reachable hospital emergency team about the transport difficulty and ask for the safest available way to reach care. The patient should not drive. If another person is present, they can help with directions or collect the medicine list and available reports while help is being arranged. Do not postpone the emergency call to gather papers, settle expenses or wait for every relative to arrive.

For an adult who is unresponsive and not breathing normally, prioritise CPR and AED response. Do not interrupt safe, effective CPR merely to arrange a car journey. AHA 2025 adult basic life support.

Heart attack: the heart muscle needs blood too

The heart pumps blood around the body, but its own muscle also needs a supply. The coronary arteries deliver oxygen-rich blood to it.

If that supply becomes insufficient, the muscle can become ischaemic - short of the oxygen it needs. When the shortage is severe and prolonged enough to cause heart-muscle cell death, we are talking about infarction. Myocardial infarction, or MI, is the medical term for a heart attack. NHLBI: heart attack, 2026 Universal Definition of MI.

A common mechanism involves a blood clot forming where the surface of an arterial plaque has been disrupted. Other mechanisms exist. We will go through those carefully in the next article. NHLBI: causes.

For now, the useful distinction is this: a heart attack does not mean the heart has necessarily stopped pumping. A person can be conscious while the muscle is being injured. A heart attack can trigger cardiac arrest, but the two are not interchangeable. AHA: heart attack and cardiac arrest.

Heart attack and arrest are different problems

Heart attack

SupplyMuscle

Too little oxygen supply. The person may be awake.

Cardiac arrest

PumpBody

No effective circulation.

Heart attack can trigger arrest. They are not interchangeable.

Conceptual illustration: two different problems that can occur together. The flow boxes are schematic, not anatomical vessels or an ECG. Read the full explanation.

Nor must the symptoms resemble a dramatic collapse in a film. Some heart attacks start with mild or intermittent discomfort. Chest discomfort is common in women as well as men; breathlessness, nausea, sweating or discomfort in one or both arms, shoulders, neck, jaw, back or upper abdomen can also occur. A familiar label such as “acidity” is not a reliable way to establish safety. NHLBI symptoms, AHA symptoms in women, heartburn or heart attack.

Stroke: the emergency is in the brain

The brain also depends on blood bringing oxygen and nutrients. A stroke can occur when a vessel supplying part of the brain becomes obstructed. That is an ischaemic stroke. A ruptured blood vessel causing bleeding produces a haemorrhagic stroke. ASA: stroke types.

Stroke: blocked or bleeding

Ischaemic stroke

Blood supply is obstructed.

Haemorrhagic stroke

A vessel ruptures and bleeds.

The symptoms do not tell you which type it is at home.

Conceptual illustration: obstruction and bleeding are different mechanisms. Clinical assessment and imaging guide the diagnosis; the drawing is not an anatomical map. Read the full explanation.

Those words are describing different mechanisms. Their treatments are not identical, and identifying the type requires clinical assessment and usually brain imaging. We cannot safely choose treatment from the symptom description alone. ASA: diagnosing stroke.

The symptoms depend on which functions are affected. Movement may change, but so may speech, understanding, vision, balance or coordination. A person does not need to have every familiar sign. ICMR stroke workflow.

This is why “paralysis” and “stroke” should not become interchangeable. Paralysis describes a loss of muscle function and has several possible causes. Stroke is one cause, and it can also affect speech or vision without the obvious loss of movement a family may expect. Do not wait for paralysis before taking sudden neurological symptoms seriously. MedlinePlus: paralysis, ASA warning signs.

You may see FAST or BE-FAST used as memory aids. ICMR’s workflow includes BE-FAST: balance, eyes, face, arms, speech and time to act. It is a prompt to recognise danger, not a test that excludes a stroke when one item looks normal.

One detail is especially useful for the emergency team: when was the person last known to be well? Here, “well” means their usual state before these new symptoms, not necessarily perfect health. ICMR’s workflow asks for this too. If symptoms were discovered on waking, that is not necessarily the time they began. Share the last-known-well time, when the change was noticed, and any uncertainty. Do not postpone the call or transport while trying to reconstruct a perfect timeline. ICMR stroke workflow, 2026 stroke-guideline overview.

Cardiac arrest: circulation has failed

Cardiac arrest means the heart is no longer pumping blood effectively enough to maintain circulation. The brain and other organs lose their supply, and the person becomes unresponsive. Dangerous heart rhythms are an important cause, but knowing the precise cause is not a prerequisite for helping. NHLBI: cardiac arrest.

That is why the combination of unresponsiveness and absent or abnormal breathing changes the immediate response. Gasping is not normal breathing. The action is emergency activation, CPR and an AED as soon as available, rather than waiting to establish whether a heart attack happened first. A responsive person breathing normally does not need chest compressions. AHA 2025 adult basic life support.

An AED is an automated external defibrillator. It assesses the heart rhythm and guides the rescuer, including whether a shock is advised. Not every arrest rhythm is shockable. Follow the device and emergency-dispatcher instructions, including continuing CPR when no shock is advised. Formal CPR/AED training is valuable, but lack of a medical qualification should not delay the emergency response described above. American Red Cross: using an AED.

India’s Ministry of Health and Family Welfare has also promoted public training in compression-only CPR. A practical session with a qualified trainer can help turn these words into a skill. This brief introduction does not cover every resuscitation situation. MoHFW’s October 2025 CPR-awareness circular, hosted by ICMR.

A few words from the case sheet

Suppose a report says “ACS”, or the team says they need another ECG or a swallowing screen. What are they trying to establish? Understanding the question behind a term is more useful than memorising the abbreviation.

ECG

A recording of the heart’s electrical activity.

What a family should understand

It helps identify urgent problems, but a reassuring first ECG alone cannot exclude a heart attack. The team may repeat it.

Troponin

A blood test measures proteins released with heart-muscle injury.

What a family should understand

A raised result can have several causes. A single test taken very soon after symptoms begin may not yet show a rise. The team interprets it with the clinical story and ECG, and may need repeat samples. The timing depends on the test used and when symptoms began; an early normal result alone is not reassurance.

ACS, or acute coronary syndrome

An umbrella term covering STEMI, NSTEMI and unstable angina. In unstable angina, there is ischaemia without evidence of acute infarction.

What a family should understand

ACS and MI are related terms, not exact synonyms. Unstable angina still needs urgent assessment.

STEMI and NSTE-ACS

STEMI is a heart-attack category associated with characteristic ST elevation on the ECG. NSTE-ACS includes NSTEMI and unstable angina.

What a family should understand

These labels help guide care. They do not let a family read the extent of damage from one tracing or assume that no ST elevation means a mild problem.

Brain CT or MRI

Scans help assess a suspected stroke, including whether bleeding is present.

What a family should understand

The team combines imaging with the history and examination; families cannot distinguish the stroke type by symptoms alone.

Thrombolysis

Medicine used to dissolve a clot in selected patients.

What a family should understand

Eligibility depends on the condition, timing and clinical findings. Thrombolysis is not treatment for a bleeding stroke or a medicine for a bystander to give.

Selected patients with an ischaemic stroke caused by a blocked large vessel may also be treated at an equipped specialist centre using a catheter procedure called mechanical thrombectomy, which removes the clot.

PCI, angioplasty and a stent

A catheter procedure can open a coronary artery, often using a small mesh tube called a stent.

What a family should understand

It is one approach to restoring heart blood flow. The clinical team chooses treatment; not every chest-pain episode needs a stent.

Swallowing screen or assessment

Trained staff check whether swallowing is safe; difficulty swallowing is called dysphagia.

What a family should understand

Someone being awake does not establish that food, water or tablets are safe. Do not test this at home with a drink.

The coronary terms follow the 2025 ACS guideline and NHLBI’s treatment explanation. For brain imaging and swallowing safety, see ASA’s diagnostic explanation and Canadian Stroke Best Practices. For repeat troponin sampling, see section 3.1.2 of the 2025 ACS guideline. For selected stroke procedures, see ASA: ischaemic stroke treatment.

What are these tests trying to establish?

Possible heart attack

ECG + troponin

A first ECG alone is not a heart-attack rule-out.

Early troponin may be normal. May need repeat samples.

Possible stroke

Brain CT / MRI

Imaging helps assess the type.

The clinical context matters. Not a home-test checklist.

Conceptual illustration: examples of tests an emergency team may use, not a universal test bundle or a screening recommendation. The glossary explains their limits. Read the full explanation.

One useful question for the treating team is: what are we checking with this test, and what will its result change? The answer depends on the person and the stage of assessment. A glossary helps us follow that conversation; it does not replace it.

TIA, short for transient ischaemic attack, describes a temporary episode of neurological symptoms related to interrupted blood flow. People sometimes call it a “mini-stroke”, but that can make it sound safe to ignore. Stroke-like symptoms that disappear still require urgent assessment. Whether the event was a TIA or a stroke is not something a family can establish simply by noticing improvement. Modern definitions distinguish TIA from an ischaemic stroke by whether acute infarction - tissue death - has occurred. MRI can reveal an acute brain infarct even after brief symptoms have resolved; that event is classified as an ischaemic stroke rather than a TIA. The risk of a subsequent stroke after a TIA is greatest early, including the first hours and days, which is another reason to seek urgent assessment. The clinical team chooses the imaging; do not delay help to arrange a particular scan. ASA: TIA, AHA scientific statement on TIA.

Heart failure does not mean the heart has stopped. It is a condition in which the heart has difficulty filling or pumping adequately for the body’s needs. It can develop over time or present acutely, and it needs medical care. It is different from cardiac arrest, although the conditions can be related. NHLBI: heart failure.

Angina is chest pain or discomfort arising when the heart muscle does not receive enough oxygen-rich blood. It is not another word for every chest pain, and the name does not establish that a new episode is harmless. New or worsening concerning symptoms need assessment; do not decide at home that it is “only angina”. NHLBI: angina.

These distinctions are worth understanding slowly. During an actual emergency, recognising danger and calling for help come first.

The same emergency does not mean the same treatment

It is easy to hear “blood clot” somewhere in this discussion and look for one medicine that would help everybody.

That is unsafe reasoning. Stroke can involve bleeding, and a person who is unconscious cannot safely be given a tablet or drink by a bystander. For suspected stroke, keep food, drink and oral medicines out of the response unless a qualified emergency professional directs otherwise. Stroke Foundation.

Aspirin can be appropriate in some suspected heart attacks, but it is not a universal treatment for chest discomfort, stroke or collapse. Ask a qualified emergency professional what is appropriate in the situation. Do not delay the call to collect medicines or follow a forwarded drug routine. Current first-aid guidance allows deferring aspirin when there is uncertainty. AHA and American Red Cross 2024 first-aid guidance.

Once the emergency is being handled, understanding the words helps families ask clearer questions: which organ is affected, what mechanism is suspected, what is known, and what is the next assessment trying to establish?

Why I want to begin here

My family’s experience is one reason these questions matter to me. It is not a substitute for medical evidence, and it cannot tell me what another person’s recovery will look like.

I also want to be careful with the word “failure”. When a family has put years into care and rehabilitation, an outcome they hoped for may still remain out of reach. That is not a measure of how much they loved or tried.

What I hope this series can offer is a little more understanding before unfamiliar words arrive in a frightening moment. Enough to recognise danger, communicate more clearly, and take the next step towards professional help.

For a family, that next step may also involve distance, money, work and someone who can accompany the person. I want this series to make room for those questions too. Understanding the medical words is one beginning; living through the care that follows is a much longer story.

In Part 2, we will return to the heart’s own blood supply and ask what actually happens during a heart attack. For today, remember the distinction: heart muscle losing its supply, brain tissue affected by obstruction or bleeding, and the heart no longer maintaining circulation are different problems. All deserve an appropriate urgent response.

This article is public health education, not an individual diagnosis or treatment plan. Medical sources and Indian emergency contacts were checked on 4 November 2026. The symptom, resuscitation and assessment refinements above were source-checked on 5 November 2026.

Review status: This is an author-approved educational article. It has not undergone independent clinician review.

Sources to keep nearby

The links alongside the explanations support the individual points. Start with the Indian service and care context, alongside the current clinical guidance: