What Is a Heart Attack? Causes and Symptoms

A heart attack, medically known as myocardial infarction, is a life-threatening condition caused by sudden blockage of the coronary vessels supplying the heart muscle. The blockage deprives the heart muscle of oxygen, and cells in the affected area begin to become damaged. Heart attacks are among the most common causes of death worldwide and in Türkiye. They usually occur suddenly, with symptoms such as chest pain, shortness of breath, and sweating, and require emergency medical attention. This article explains what a heart attack is, heart attack symptoms and causes , risk factors, and ways to prevent a heart attack . You will also find answers to frequently asked questions about the topic.

What Is a Heart Attack?

A heart attack occurs when one of the blood vessels supplying the heart, called a coronary artery , suddenly becomes blocked, stopping blood flow to that part of the heart muscle. This usually happens when a deposit of fat and cholesterol in the coronary artery wall, called an atherosclerotic plaque , ruptures and triggers a blood clot. Blood flow stops, and lack of oxygen begins to cause tissue death (infarction) in the heart muscle within minutes.

Because a heart attack is a sudden, life-threatening event, early treatment saves lives. The sooner the blocked artery is reopened, the less damage occurs to the heart muscle. Recognizing symptoms and acting quickly are therefore crucial. Some heart attacks occur very abruptly, while others are preceded by warning signs. Let us examine the symptoms more closely.

Heart Attack Symptoms

Heart attack symptoms usually begin suddenly and severely. The most typical symptom is intense chest pain and tightness beginning in the center of the chest. This pain often spreads to the left arm, shoulder, or jaw. The person may also experience shortness of breath, cold sweats, dizziness or a feeling of faintness, and nausea . Some people have severe symptoms during the attack, while others experience mild warning signs beforehand. The following table compares early symptoms with common (typical) symptoms :

The most common symptom during a heart attack is severe chest pain. Patients often describe a “weight or pressure on my chest,” with pain spreading from the chest to the arm or neck. Cold sweating, pale skin, and intense anxiety may accompany it. The person may experience shortness of breath and feel unable to breathe. Other symptoms include nausea, vomiting, dizziness , and sudden weakness. Not everyone having a heart attack experiences all symptoms together. In particular, people with diabetes or some female patients may experience atypical symptoms . In a silent heart attack , a person may even have an attack without significant pain. Pay attention to unusual symptoms and seek medical attention promptly if an attack is suspected.

Causes of a Heart Attack

The main cause of a heart attack is blockage of a coronary vessel supplying the heart muscle. In most cases, this occurs when an atherosclerotic plaque(a deposit of fat and cholesterol) that has built up in the artery wall over the years suddenly ruptures and a blood clot forms over it. Blood flow is completely interrupted, and heart muscle cells begin to become damaged within minutes. Coronary artery disease , this process of arterial hardening, is the main cause of heart attacks.

Various factors contribute to the plaque formation that causes arterial blockage and heart attacks. High cholesterol and triglyceride levels, high blood pressure (hypertension), smoking, and diabetes accelerate plaque buildup in the arteries and increase heart attack risk. Intense stress or excessive exercise can trigger plaque rupture in an already narrowed artery and precipitate an attack.

More rarely, coronary artery spasm (temporary constriction of a heart artery) may interrupt blood flow and cause a heart attack. Coronary spasm can be triggered by severe stress, illegal drug use such as cocaine, or exposure to cold, and can cause an attack without significant underlying plaque. Very rarely, tearing or trauma to the artery wall or severe hypoxia (low oxygen in the blood) may also result in a heart attack. These are uncommon special situations.

In summary, the main cause of a heart attack is blockage of a heart artery. Let us now examine the risk factors that predispose to this blockage.

Heart Attack Risk Factors

Heart attack risk factors are characteristics that increase a person's likelihood of developing heart disease and arterial blockage. Some cannot be changed, while many relate to lifestyle and can be controlled. We can divide risk factors into nonmodifiable and modifiable groups:

Nonmodifiable Risk Factors

• Age: Heart attack risk increases with age. It becomes particularly apparent above 45 years in men and 55 years in women.
• Sex: Heart attacks are more common in men than women up to middle age. After menopause, women's risk approaches that of men.
• Family History (Genetic Predisposition): People with a first-degree relative (mother, father, or sibling) who had a heart attack or coronary artery disease at a young age have a higher risk. Genetic factors may affect arterial structure and cholesterol metabolism, increasing the likelihood of a heart attack.
• Previous Cardiovascular Disease: A previous heart attack or another problem caused by arterial blockage, such as a stroke, increases the risk of another heart attack. Similarly, a history of preeclampsia during pregnancy increases a woman's risk of heart disease in later years.

Modifiable Risk Factors

• Smoking and Tobacco Use: Smoking is one of the most important risk factors for a heart attack. Tobacco smoke damages the arteries, accelerates plaque formation, and increases the tendency to form clots. Secondhand smoke also increases heart attack risk.
• High Blood Pressure (Hypertension): High blood pressure damages and hardens artery walls. Uncontrolled hypertension predisposes to heart attacks.
• High Cholesterol: High levels of LDL (bad) cholesterol and low levels of HDL (good) cholesterol in the blood cause fatty plaques to accumulate in the arteries. High triglyceride levels are also a risk factor.
• Diabetes: Diabetes substantially increases the risk of blockage in heart arteries by damaging blood vessels and promoting high cholesterol. Heart attack symptoms may also go unnoticed in people with diabetes, so they should be aware of the risk.
• Obesity: Excess weight brings other risk factors, including high blood pressure, diabetes, and high cholesterol. People with obesity are more likely to have a heart attack. Fat around the abdomen (abdominal obesity) is a particular indicator of risk.
• Sedentary Lifestyle: A lack of regular physical activity is harmful to cardiovascular health. Insufficient exercise increases susceptibility to obesity and contributes to high blood pressure and cholesterol.
• Unhealthy Diet: A diet high in fatty, salty, processed foods and low in vegetables and fruit accelerates arterial hardening. By promoting obesity and high cholesterol and blood pressure, an unhealthy diet indirectly increases heart attack risk.
• Excessive Alcohol Use: Frequent heavy drinking raises blood pressure and can damage the heart muscle. It also raises triglycerides, adversely affecting the arteries. Although some views suggest small amounts of alcohol may be protective, limiting alcohol consumption is generally recommended.
• Stress and Psychosocial Factors: Chronic stress, anxiety, and depression can adversely affect heart health. Stress hormones can constrict blood vessels, raise blood pressure, and cause abnormal heart rhythms. Heart attacks may occur more frequently in people under intense stress.
• Other Diseases: Metabolic syndrome, the combination of insulin resistance, high blood pressure, obesity, and abnormal cholesterol, greatly increases heart attack risk. Chronic kidney disease and autoimmune diseases , such as rheumatoid arthritis and lupus, may also affect blood vessel health and increase risk.

Many risk factors are linked to lifestyle and health habits. The encouraging point is that managing modifiable risk factors can substantially reduce the likelihood of a heart attack. The next section discusses what we can do to prevent one.

Ways to Prevent a Heart Attack

Although complete prevention is not always possible, you can substantially reduce your risk. Controlling modifiable risk factors in particular can protect the heart's arteries. Here are lifestyle recommendations to help prevent a heart attack and other preventive measures:

• Do not smoke: If you smoke, quitting is one of the greatest things you can do for your heart. Avoiding cigarettes and tobacco products can substantially lower heart attack risk. Avoid secondhand smoke as well.
• Eat healthily: Follow an artery-friendly eating plan. Eat plenty of vegetables, fruit, whole grains, legumes, and fish rich in omega-3. Avoid processed foods high in salt, sugar, and saturated fat. Limit red meat and consume white meat and healthy fats such as olive oil in moderation. A Mediterranean diet is a recommended eating pattern for heart health.
• Exercise regularly: Aim for moderate-intensity aerobic activity, such as brisk walking, on at least 3-4 days each week, totaling at least 150 minutes weekly. Being physically active strengthens the cardiovascular system and helps control blood pressure and weight. If starting a new exercise routine, consult your doctor to choose a suitable program.
• Control your weight: Try to stay within a healthy body mass index (BMI) range for your height. Lose excess weight through balanced eating and exercise, focusing particularly on reducing abdominal fat. A healthy weight is an important step in heart attack prevention.
• Control blood pressure and blood sugar: Blood pressure and blood sugar should be monitored regularly. If you have hypertension or diabetes, follow your doctor's treatment plan and take medicines regularly. Keeping blood pressure and blood sugar controlled prevents vascular damage and reduces heart attack risk.
• Lower your cholesterol: Have your blood lipids measured under medical supervision. If you have high cholesterol , lower LDL cholesterol to target levels through diet, exercise, and, if necessary, cholesterol-lowering medicines such as statins. Healthy eating and exercise also help raise HDL (good cholesterol).
• Manage stress and get enough rest: Introduce relaxation techniques to reduce chronic stress. Manage psychological stress through yoga, meditation, hobbies, or professional support. Also aim for regular, sufficient sleep , usually 7-8 hours each night. Good-quality sleep is important for heart health; sleep deprivation can strain the heart by affecting blood pressure and hormones.
• Drink alcohol in moderation: If you drink alcohol, avoid excess. A general recommendation is no more than 2 glasses of alcoholic drinks daily for men and 1 for women. Remember that excessive alcohol can harm the heart. Not drinking alcohol is the lowest-risk option.
• Have regular health checkups: Do not neglect regular medical checkups, particularly if you are over 40 or have a family history of heart disease. Routine examinations and tests, such as cholesterol, blood sugar, ECG, and exercise stress testing, can help identify problems early. Early identification and appropriate treatment of hypertension or diabetes can prevent heart attacks.

Incorporating these measures into your life substantially protects cardiovascular health. Remember that heart attacks are largely preventable, and small changes are an investment in long-term heart health.

Frequently Asked Questions

What Should You Do During a Heart Attack?
When heart attack symptoms begin, the most important step is to call for medical help immediately (call 112) and get to hospital as quickly as possible. The person should avoid exertion, rest sitting down if possible, and inform those nearby. If alone, taking steps to help emergency responders gain access, such as opening the door, may be useful. If aspirin is available or the ambulance service advises it, chewing an aspirin may reduce the clot, but this does not replace medical help. If the person loses consciousness, bystanders should begin basic life support, such as chest compressions, and continue until medical teams arrive.

How Long Does a Heart Attack Last?
The duration of a heart attack varies with its severity and the treatment provided. Chest pain usually lasts more than 20 minutes and does not improve with rest; in some cases, pain and other symptoms continue for several hours. Early treatment to reopen the blocked artery can shorten the pain. If treatment is delayed, however, symptoms may last for hours as heart muscle damage progresses. Heart attack symptoms can therefore last from a few minutes to several hours. In every case, seeking emergency help without delay when symptoms appear is crucial.

Where Does Heart Attack Pain Spread?
Heart attack pain usually begins in the center of the chest. Described as pressure, tightness, or burning, it often spreads to the left arm . It can also radiate to the left shoulder, neck, jaw , and back. Some people feel pain in the upper abdomen , where it may be mistaken for stomach pain or indigestion, or in both arms. Although left arm pain is classically more common, isolated pain in the right arm, neck, or jaw may also indicate a heart attack. Pain beginning in the chest and spreading to these areas should therefore prompt emergency assessment for a possible heart attack.

What Is a Silent Heart Attack? What Are Its Symptoms?
A silent heart attack is an attack that goes unnoticed because it does not cause obvious symptoms such as typical chest pain. The person may not immediately realize an attack has occurred. Symptoms are usually very mild or vague. Examples include unusual fatigue lasting several days, brief episodes of shortness of breath , mild chest discomfort, cold sweating, or mild jaw or back pain . The person may dismiss these as routine discomfort. Silent heart attacks are particularly common in patients with diabetes , because diabetes-related nerve damage can reduce pain sensation. Even a silent attack can damage the heart, and it may be detected later on tests such as an ECG or heart ultrasound (echocardiogram). People with unexplained symptoms should therefore seek medical advice.

Are Heart Attack Symptoms Different in Women?
Yes. Women's symptoms can differ somewhat from men's and may sometimes be milder or atypical . Severe chest pain, commonly seen in men, may not always be prominent in women. Women may more frequently experience the following before or during a heart attack:

• Unusual fatigue and weakness (which may begin days beforehand),
• Sleep disturbances or unexplained anxiety,
• Shortness of breath and becoming tired quickly even with mild exertion,
• Jaw, neck, or back pain (which may occur without chest pain),
• Nausea, indigestion , or stomach pain.

Women can, of course, also have chest pain, but these other symptoms may sometimes be more prominent. This can lead to a heart attack being mistaken for another condition. Regardless of sex, everyone should pay attention to unusual symptoms, particularly when risk factors are present, and seek medical help when necessary.

Is a Mild (Small) Heart Attack Dangerous?
Less severe attacks affecting a small part of the heart muscle are commonly called “mild heart attacks.” Even when symptoms are relatively mild, the attack must still be taken seriously. The heart has already sustained damage, indicating an increased risk of a larger heart attack in the future. Heart muscle weakness (heart failure) or abnormal rhythms may develop after a mild attack. Anyone who has had a “small” heart attack therefore needs cardiology follow-up, adherence to recommended treatment (medicines and, if necessary, a stent or bypass surgery), and full implementation of lifestyle measures. Remember that any heart attack, even a mild one, is a warning, and every precaution should be taken to prevent a second attack.

Conclusion

This covers the basic facts about heart attacks, their symptoms, causes, and prevention. Using this information to control risk factors for yourself or your loved ones can play a major role in preventing a heart attack. If you or someone close to you experiences heart attack symptoms, remember to seek emergency medical help without hesitation. We wish you good health.