Mechanism of a Heart Attack: What Actually Happens Inside Your Arteries
Many people think a heart attack strikes without warning. But the truth is, the process starts silently — often years before any symptoms appear. Dr. Nikhila Pachani, Consultant Interventional Cardiologist at Backbone Medicity Hospital, Rajkot, breaks it down in simple terms.
It Starts With Plaque
Inside the arteries that supply blood to your heart, fat and cholesterol can slowly build up along the inner walls over time. This buildup is called plaque. It narrows the artery and makes it stiffer, but at this stage, many people feel nothing at all.
Then the Plaque Ruptures
At some point, that plaque can crack or rupture. When this happens, the body reacts by forming a blood clot at that spot — almost like a scab over a wound. This clot can grow very quickly and completely block the artery.
The Heart Muscle Is Cut Off
Once the artery is blocked:
- Blood can no longer reach that part of the heart muscle.
- Oxygen supply stops.
- The heart muscle begins to die.
This is a heart attack (medically called a myocardial infarction).
Warning Signs to Watch For
Time is critical during a heart attack. Seek emergency care immediately if you or someone nearby experiences:
- Chest pain or pressure — often described as a squeezing or heaviness
- Sweating — sudden, cold sweating without obvious reason
- Breathlessness — even at rest
- Pain spreading to the arm, jaw, or back
⏱️ Every minute matters. The sooner the blocked artery is opened, the more heart muscle can be saved.
The Key Takeaway
A heart attack does not appear out of nowhere. It builds quietly inside your arteries over months or years. Knowing the warning signs — and acting fast — can make a life-saving difference.
If you have risk factors like high blood pressure, diabetes, high cholesterol, or a family history of heart disease, consider speaking with a qualified cardiologist for a proper evaluation.