Myocardial Infarction

Myocardial infarction (MI), commonly known as a heart attack, is a serious medical emergency that occurs when blood flow to a part of the heart muscle is blocked. Without enough oxygen, the affected heart muscle begins to get damaged. Immediate medical treatment is essential to reduce complications and save heart function.

The most common cause of a heart attack is the buildup of fatty deposits (plaque) inside the coronary arteries. When a plaque ruptures, a blood clot can form and block blood flow to the heart muscle.

Coronary artery disease (blocked heart arteries)

Blood clot blocking a coronary artery

Coronary artery spasm (sudden narrowing of the artery)

Rarely, trauma or certain medical conditions affecting blood flow.

Some factors increase the risk of developing a heart attack:

High blood pressure

Diabetes

High cholesterol

Smoking or tobacco use

Obesity

Physical inactivity

Unhealthy diet

Stress

Excessive alcohol consumption

Family history of heart disease

Increasing age

Symptoms can vary from person to person. 

Chest pain, pressure, tightness, or heaviness

Pain spreading to the left arm, shoulder, neck, jaw, or back

Shortness of breath

Cold sweating

Nausea or vomiting

Dizziness or fainting

Unusual fatigue, especially in women

Indigestion-like discomfort

Important: If you or someone nearby experiences these symptoms, seek emergency medical care immediately. Early treatment can save lives.

Doctors may use:

Medical history and physical examination

Electrocardiogram (ECG)

Blood tests (cardiac enzymes such as troponin)

Echocardiogram

Coronary angiography

Cardiac CT or MRI in selected cases

Treatment depends on the severity and timing of the heart attack.

Medications

Antiplatelet medicines

Blood thinners

Clot-dissolving medicines (in selected cases)

Nitroglycerin

Beta-blockers

ACE inhibitors or ARBs

Statins

Primary angioplasty (PCI) with stent placement

Coronary artery bypass graft (CABG) surgery when needed

Recovery involves lifestyle changes and regular follow-up.

Take medicines exactly as prescribed.

Attend cardiac rehabilitation if recommended.

Eat a heart-healthy diet.

Exercise regularly after your doctor's approval.

Stop smoking.

Control blood pressure, diabetes, and cholesterol.

Manage stress.

Keep follow-up appointments.

No. A heart attack is caused by blocked blood flow to the heart muscle, while cardiac arrest is when the heart suddenly stops beating effectively.

Yes. Although more common in older adults, heart attacks can occur in younger people, especially those with risk factors such as smoking, diabetes, obesity, or a strong family history.

Yes. Women may experience fatigue, nausea, shortness of breath, or jaw and back pain instead of classic chest pain.

Yes. Healthy habits can significantly reduce the risk.

Eat more fruits, vegetables, whole grains, and lean proteins.

Limit salt, sugar, and unhealthy fats.

Exercise for at least 150 minutes each week.

Maintain a healthy body weight.

Avoid smoking and tobacco.

Limit alcohol intake.

Get regular health check-ups.

Manage diabetes, blood pressure, and cholesterol.

Call emergency medical services immediately if you have:

Chest pain lasting more than a few minutes

Chest pain with sweating or breathlessness

Pain spreading to the arm, jaw, or back

Sudden collapse or loss of consciousness

Do not ignore these symptoms or try to drive yourself to the hospital if emergency medical services are available.

Prompt treatment can restore blood flow and reduce heart damage, but long-term care and lifestyle changes are essential.

Recovery varies depending on the severity of the heart attack and overall health. Many people gradually resume normal activities within weeks, under medical guidance.

A myocardial infarction is a life-threatening emergency that requires immediate treatment. Recognizing the warning signs early and seeking prompt medical care can save lives. Adopting a healthy lifestyle, controlling risk factors, and attending regular medical check-ups are the best ways to protect your heart.