Today, cardiovascular diseases are among the leading causes of death—especially the “silent threat” of a heart attack, which often strikes without warning. Having knowledge and understanding of the warning signs before a heart attack and various risky behaviors is a protective shield that can help keep you and your loved ones away from a crisis that may lead to loss. Today, we will summarize everything you should know about this condition.
What is a Heart Attack, and Why Should You Be Cautious?
A heart attack or acute myocardial ischemia (Heart Attack or Myocardial Infarction) occurs when the coronary artery that supplies the heart muscle becomes suddenly blocked, preventing sufficient blood and oxygen from reaching the heart muscle. Without rapid treatment, heart muscle cells begin to be damaged and die.
Common symptoms include chest tightness or pressure as if something heavy is pressing down, pain radiating to the left arm, neck, jaw, or back, heavy sweating, nausea, shortness of breath, and unusual fatigue.
A heart attack is a medical emergency. Patients should go to the hospital as quickly as possible because the sooner the blocked artery is opened, the more heart muscle damage can be reduced, complications lowered, and survival chances increased.
Causes of a Heart Attack: What Does It Come From?
Understanding where a heart attack originates helps us plan prevention more effectively. A heart attack, or acute myocardial ischemia (Heart Attack), occurs when the coronary artery that delivers blood to the heart muscle becomes suddenly blocked, causing the heart muscle to be deprived of oxygen and begin to be damaged. If not treated promptly, it may lead to heart failure, severe arrhythmias, or death.
1. Direct causes that lead to an acute heart attack (Heart Attack)
Most heart attacks are caused by plaque rupture within the coronary artery wall. When plaque ruptures, the body forms a blood clot to seal the area, resulting in sudden narrowing or blockage of the coronary artery, so blood cannot adequately supply the heart muscle.
Other possible causes include:
- Severe coronary artery spasm (Coronary Artery Spasm)
- A blood clot blocking the coronary artery (Coronary embolism)
- Complications from the use of certain illicit drugs such as cocaine or amphetamines
- Tearing of the coronary artery wall (Spontaneous Coronary Artery Dissection; SCAD)
2. Risk factors that increase the chance of a heart attack (Heart Attack)
Although a heart attack occurs suddenly, the underlying buildup often takes many years. Key risk factors include:
- High cholesterol or high blood lipids, especially high LDL-C
- High blood pressure
- Diabetes
- Smoking or continuous exposure to secondhand smoke
- Overweight and obesity
- Lack of exercise
- Chronic stress and insufficient rest
- A family history of coronary artery disease at a young age
- Increasing age, especially men over 45 and women after menopause
Proper control of these risk factors—such as quitting smoking, controlling blood pressure, diabetes, and blood lipid levels, and exercising regularly—can significantly reduce the risk of a heart attack.
Warning Signs Before a Heart Attack: What Your Body Is Trying to Tell You
Although a heart attack or acute myocardial ischemia (Heart Attack) often occurs suddenly, some patients may experience warning signs days or weeks before the actual event. These symptoms occur because the coronary arteries begin to narrow further, reducing blood flow to the heart muscle.
- Chest tightness with exertion A feeling of tightness, discomfort, or as if something heavy is pressing on the center of the chest—especially when walking fast, exercising, climbing stairs, or doing strenuous activities—and the symptoms improve with rest
- Unusual easy fatigue Activities that used to be normal—such as walking a short distance, climbing stairs, or doing housework—now cause more fatigue than usual without another clear explanation
- Pain radiating to other areas Chest pain or tightness may radiate to the left arm, shoulder, neck, jaw, back, or upper abdomen (epigastric area), which are common locations in patients with coronary artery disease
- Shortness of breath or breathlessness with exertion Some people may not have clear chest pain but experience increased fatigue or difficulty breathing—especially in older adults, patients with diabetes, and women
- Palpitations, dizziness, or lightheadedness This may result from reduced blood flow to the heart affecting the heart’s electrical system, causing temporary arrhythmias
- Unusual heavy sweating, nausea, or sudden fatigue Especially when occurring together with chest tightness or shortness of breath, you should see a doctor immediately
Some patients—especially those with diabetes, older adults, and women—may not have classic chest pain, but instead show only easy fatigue, weakness, or abdominal discomfort, which can delay diagnosis.
Screening to Prevent a Heart Attack
For people aged 35 and older, coronary arteries tend to undergo changes that may affect future health. Therefore, heart health screening is recommended to identify preventable risk factors early. If you learn about your heart disease risk sooner, you can adjust your lifestyle appropriately and see a doctor for ongoing heart checkups, helping keep your heart strong in the long term.
Coronary Artery Calcium (CAC) Score Screening to Prevent Problems Before It’s Too Late
One way to reduce risk is a coronary artery calcium score test (Coronary Artery Calcium Score or CAC) to detect calcium deposits on the coronary artery walls, without contrast injection and with a scan time of only 10–15 minutes. The resulting score should not be 400 points or higher; if it is higher, itindicates a risk of coronary artery narrowing, acute myocardial ischemia, or severe coronary artery stenosis or blockage which is a major factor thatmay lead to a severe heart attack. This test helps doctors assess andeffectively prevent premature death from heart disease.
Bangkok Hospital Heart Hospital follows internationally standardized patient-care protocols, with cardiologists and highly skilled personnel available 24 hours a day. With modern tools and equipment, procedures or emergency surgery can be performed immediately to reduce disease severity and help patients return to living happily again.
- Find a doctor: https://www.bangkokhospital.com/th/bangkok/doctor
- Make an appointment: https://www.bangkokhospital.com/th/bangkok/appointment/step1
- Contact us: https://www.bangkokhospital.com/th/bangkok/contact
Expert Recommendations for a Strong Heart
From the experience of closely caring for heart disease patients, it has been found that insufficient rest and ignoring the body’s warning signs are key factors that affect heart health.
“I want everyone to take care of their health while also being cautious of risky behaviors—especially consuming foods that are too high in sodium or fat, which may trigger the heart to work harder until a critical condition occurs. For those with a history of heart disease, the most important thing is to always carry medication and take it strictly as prescribed by the doctor.”
Frequently Asked Questions About Heart Attacks
How is a heart attack different from cardiac arrest?
A heart attack (Heart Attack) is caused by a blocked coronary artery, resulting in reduced blood flow to the heart muscle. Cardiac arrest is when the heart suddenly stops pumping blood due to an abnormality in the heart’s electrical system. It is an emergency that requires immediate CPR and the use of an AED. Both conditions are life-threatening and require rapid treatment by specialists.
What is the most common warning sign 1 month before a heart attack?
Common symptoms include chest tightness with exertion, unusual easy fatigue, shortness of breath, or pain radiating to the arm, neck, jaw, or back. However, some patients may have no warning signs and may develop sudden symptoms.
What should you do first if someone close to you has an acute heart attack?
If there is chest tightness lasting more than 10–15 minutes, heavy sweating, or difficulty breathing, call emergency ambulance services at 1179 for urgent help. If the patient is unconscious and not breathing normally, start CPR and use an AED immediately to increase the patient’s chance of survival.
How necessary is coronary calcium screening or a CAC Score?
It is very important for assessing risk before disease occurs because it clearly shows calcium buildup in the arteries without needing contrast injection, especially for those at moderate risk. If the score is found to be above the threshold, the doctor can plan preventive measures to reduce the chance of acute myocardial ischemia in the future.
Can heart attack patients return to normal life?
They can return to life if they receive correct and continuous treatment. Patients must adjust dietary habits, exercise as recommended by the doctor, and take medications strictly. Follow-up with a multidisciplinary team will help restore heart function and strengthen it again.
