Cardiovascular diseases ( CVDs ) cause an estimated 17.9 million deaths annually, representing 31% of all global deaths, as per the . Imagine a person suddenly collapsing while chatting or working out, and everyone around freezes, unsure of what’s happening. Many instantly assume it’s a “heart attack.” But what if it’s actually a cardiac arrest ? Though both sound similar and involve the heart, they’re not the same, and confusing one for the other can be dangerous. Understanding the difference isn’t just medical trivia; it’s something that could genuinely help save a life someday.





Heart attack : The blockage that builds over time





A heart attack, medically called a myocardial infarction, happens when blood flow to a part of the heart is blocked, often due to a buildup of fat, cholesterol, or plaque in the arteries. The heart doesn’t suddenly stop beating; it struggles because one of its lifelines is clogged.





Unlike what movies show, a heart attack doesn’t always strike suddenly with dramatic chest pain. Sometimes, the signs are subtle, such as fatigue, mild chest pressure, jaw discomfort, or even shortness of breath that lasts for hours or days. According to the , early warning signs can appear long before the actual attack. This is why timely medical help can prevent serious damage to the heart muscle.





It’s a condition that whispers before it screams.





Cardiac arrest: When the heart suddenly shuts down





Cardiac arrest, on the other hand, is more like a power failure. It’s not a plumbing issue like a heart attack; it’s an electrical one. The heart’s rhythm goes haywire; it either beats too fast, too slow, or stops altogether. This causes the heart to stop pumping blood, leading to an immediate collapse and loss of consciousness.





The person stops breathing, and within minutes, the brain begins to shut down due to lack of oxygen. It’s sudden, severe, and needs immediate action; CPR (cardiopulmonary resuscitation) or an AED (automated external defibrillator) can make the difference between life and death.








Many cardiac arrests actually start with a heart attack, but not always. Sometimes, the cause lies in inherited heart rhythm disorders or conditions like ventricular fibrillation, where the heart quivers instead of beating properly.





Why the confusion happens, and why it matters





The confusion between a heart attack and cardiac arrest is natural because both are emergencies and both involve the heart. But the response needed for each is entirely different.

A heart attack often gives warning signs, calling emergency services, taking prescribed medication, and staying calm can help prevent it from escalating.

A cardiac arrest offers no warning. It demands instant action, performing CPR, using a defibrillator if available, and calling for medical help immediately.

Recognising the difference doesn’t just make one more informed; it makes one capable of acting quickly when it matters most. And sometimes, that’s what keeps a heart beating.





What is the connection between the two?





While they’re different, heart attacks and cardiac arrests are not enemies, they’re distant relatives connected through heart health . A severe heart attack can sometimes trigger a cardiac arrest, especially when the heart’s electrical system becomes unstable due to damage from the blocked artery.





That’s why cardiologists often emphasise preventive care, controlling cholesterol, maintaining healthy blood pressure, staying active, managing stress, and avoiding smoking. These steps not only reduce the risk of a heart attack but also lower the chances of cardiac arrest.





In short, what’s good for the arteries is good for the rhythm of life.





Why should we know the difference





It’s easy to scroll past medical facts, thinking they’ll never apply. But every family, friend group, or workplace has someone who might someday face a cardiac event. Knowing the signs, understanding what’s happening, and acting calmly could save that person.





There’s something powerful about being informed, not out of fear, but out of empathy. It’s about caring enough to be ready. Because sometimes, saving a life doesn’t start in a hospital, it starts with awareness.






Disclaimer: This article is for informational purposes only and should not be considered medical advice. In case of chest pain, sudden collapse, or loss of consciousness, seek immediate emergency medical assistance .