Myocardial Infarction (Heart Attack)

Overview of Myocardial Infarction (Heart Attack)

Myocardial infarction is commonly known as a heart attack, occurs when blood flow to a part of the heart is blocked, usually by a blood clot, leading to damage or death of heart muscle tissue. This medical emergency is often the result of ischemia, a condition where oxygen-rich blood is reduced or cut off entirely. Prompt medical care is critical to minimize heart damage and save lives.

Types of Heart Attack

1. ST-Elevation Myocardial Infarction (STEMI): Complete blockage of a coronary artery, evident on ECG.

2. Non-ST-Elevation Myocardial Infarction (NSTEMI): Partial blockage; damage is less visible on ECG.

3. Silent Heart Attack: No obvious symptoms, but damage occurs silently—common in diabetics.

4. Type 2 MI: Imbalance between oxygen supply and demand without coronary artery obstruction.

5. Anterior & Inferior Myocardial Infarction: Based on the heart area affected (front or lower wall).

Symptoms of Myocardial Infarction

Sudden chest pain or pressure (may radiate to left arm, back, jaw).

Shortness of breath and extreme fatigue.

Cold sweats and lightheadedness.

Nausea or vomiting.

Irregular heartbeat or palpitations.

In women: jaw pain, upper back pain, extreme fatigue or shortness of breath (often without chest pain).

Causes of Myocardial Infarction (Heart Attack)

Blockage in coronary arteries due to atherosclerosis

Ruptured plaque causing a blood clot

Severe coronary artery spasm

Cocaine use or extreme stress

Sudden narrowing of arteries (coronary ischemia)

Complications in Heart Attack

Heart failure due to weakened pumping ability

Arrhythmias and sudden cardiac arrest

Cardiogenic shock

Pericarditis or inflammation around the heart

Recurrent infarction or ischemia

Risk Factors of Heart Attack

High blood pressure, cholesterol and diabetes

Smoking and obesity

Sedentary lifestyle and poor diet

Stress and excessive alcohol use

Family history of ischemic heart disease

Age (Men >45, Women >55)

Preventions of Myocardial Infarction

Healthy lifestyle with regular exercise and diet

Managing blood pressure, sugar and cholesterol levels

Avoiding tobacco and excessive alcohol

Stress reduction techniques like yoga or meditation

Taking aspirin if prescribed for cardiac protection

Early screening if you have risk factors or family history