Introduction

Myocardial infarction, or a heart attack, happens when the part of the heart cannot get enough blood because of blockages in the coronary arteries that provide blood to the heart or due to plaque buildup in the arteries. This blockage stops oxygen from reaching the heart muscle, which can cause damage to the heart muscle, leading to tissue damage or necrosis. Typical risk contributors are heart diseases, high blood pressure, high cholesterol, uncontrolled diabetes, smoking, sedentary lifestyle and obesity. If this condition isn’t managed promptly, the heart muscle can be affected permanently, or the heart may completely stop functioning. 

An enlarged heart condition, referred to as cardiomegaly, is a condition where the heart is abnormally big in size. It could be congenital or occur in later stages of life. People with an enlarged heart often have underlying cardiac issues, which cause them to struggle with pumping blood efficiently, making them more vulnerable to complications such as myocardial infarction.

Common signs of myocardial infarction

People with an enlarged heart are more prone to myocardial infarctions, though an enlarged heart itself is not the only cause for heart attacks; many other cardiac conditions may cause myocardial infarction.In people with heart enlargement, the common signs of myocardial infarction can sometimes be similar or even worse because of their existing heart condition.

• Chest pain or discomfort: people may feel pressure, especially while sneezing or coughing, mild discomfort or a feeling of fullness or heaviness in the chest. Sometimes chest pain can spread to other parts, like the jaw, shoulders, neck, back or left arm
• Nausea, indigestion, or vomiting: these symptoms may mimic hyperacidity symptoms or gastrointestinal issues but could indicate a cardiac event, especially in women and older adults
• Shortness of breath: it is typical to face challenges with breathing, and those with heart enlargement usually experience shortness of breath, which can worsen during a heart attack, especially during exercise or exertion
• Irregular or rapid heartbeats or palpitations: people with an enlarged heart often have an underlying rhythm disturbance, which may become more noticeable or erratic during a myocardial infarction
• Fatigue and weakness: extreme sudden fatigue, weakness or lightheadedness even after normal activity could indicate myocardial infarction
• Swelling: people with heart enlargement often notice swelling in the legs, ankles or abdomen, which can intensify during heat attack
• Cold sweats: profuse sweating without physical exertion, especially if accompanied by chest discomfort, is also a common symptom of a heart attack

Some heart attacks (myocardial infarction) happen suddenly, but many people get warning signs just within a short time.

Physical exam findings

• Abnormal blood pressure: either high blood pressure due to stressors, or sometimes, people may get low blood pressure due to decreased cardiac output in people with heart enlargement
• Irregular heartbeats or palpitations: suggestive of arrhythmias, may be present, and it indicate issues with the heart
• Abnormal heart sounds: worsening of the heart murmur due to valvular dysfunction or reduced cardiac output may be seen
• Cyanosis: a bluish discolouration of the skin, lips or fingertips, also known as cyanosis, due to decreased blood supply, may be seen in some people
• Peripheral oedema: swelling in the legs and ankles, known as peripheral oedema, due to fluid accumulation because of poor cardiac health
• Diaphoresis: profuse sweating, also known as diaphoresis, the body feels cold due to inadequate blood supply, and strain on the heart can be a sign for myocardial infarction
• Hypoxia: confusion, anxiety, and restlessness could be present in some people, particularly in older adults
• Tachypnoea: When the body requires more oxygen but is insufficiently supplied, it can lead to increased breathing rate

Diagnostic tools

• Electrocardiogram (ECG): it is a test that records the electrical activity of the heart. It helps in the diagnosis of myocardial infarction. ECG machine has some wires, and these wires are placed on the heart and catch electrical signals and show the beating or functioning of the heart. It shows the important findings or any abnormality and help the doctors to decide for prompt treatment
• Chest X-ray: it shows the size of the heart, any fluid accumulation in the pleural space or any infection that might be related to heart problems. Extra fluid present in the lungs might be because of the improper functioning of the heart
• Blood tests:
• Cardiac biomarkers: elevated troponin, creatine kinase-MB (CK-MB), B-type natriuretic peptide levels, and myoglobin levels are specific indicators of cardiac muscle injury.
• Complete blood count: it can help to identify anaemia or any infection present in the body, which can affect heart function
• Lipid Profile: It measures cholesterol and triglyceride levels, if it ranges above normal, then it can lead to the development of coronary artery diseases and even a heart attack
• Electrolytes panel: measure electrolytes like sodium, potassium and bicarbonate levels, glucose and calcium levels, imbalances in these electrolytes may indicate a heart problem
• Echocardiography: This ultrasound waves to create heart pictures, so if any abnormalities are present in the heart structures, this can be seen and treated accordingly
• Stress test: it checks how well the heart functions under stress. During the stress test, the doctor may ask the person to walk on a treadmill, check heart rate, blood pressure, and breathing during the procedure and check the ECG and how the heart functions during stress. This test gives an idea about the overall health of the heart, pumping action, oxygen supply during physical activity or if there are any problems in the heart
• Coronary angiography: it is a specific X-ray, also known as a coronary angiogram, used to see the proper blood supply to the heart or if the arteries which supply blood to the heart are properly open or blocked, so it is a useful diagnostic test to find out any blockages in the heart
• Computed tomography (CT) for the heart: it is also used to find out blockages in the arteries
• Magnetic resonance imaging (MRI): it can also be used in some patients as a diagnostic tool

FAQs

Why do people with an enlarged heart have a higher risk of heart attack?

An enlarged heart doesn’t pump blood efficiently, which causes extra strain or pressure on the heart. This condition causes blood pumping problems easily and might result in blocked arteries. These blockages cause a heart attack.

Can anyone survive a heart attack if they have an enlarged heart?

Yes, anyone can survive a heart attack with prompt treatment. Seeking medical help immediately can significantly increase the chances of survival, so it is important to identify the symptoms and get medical help as early as possible.

Can lifestyle changes help lower the risk of a heart attack in people with heart enlargement?

Yes, making lifestyle changes can help, like eating healthy and balanced foods, exercising regularly, avoiding processed and junk foods, avoiding smoking and drinking alcohol, managing metabolic disorders like diabetes, controlling blood pressure, doing yoga, meditation or relaxation techniques can all lower risk of a heart attack.

How can someone monitor or check their heart health if they have an enlarged heart?

Regular health check-ups, monitoring blood pressure regularly, eating a healthy and balanced diet, and noticing any symptoms like chest pain, breathing difficulty or tiredness can help anyone monitor their heart health.

What role does diet play in managing an enlarged heart?

A healthy and balanced diet, like eating whole grains, protein-rich diet, green leafy vegetables low-salty and sugary foods, and less oily and fatty foods, and avoiding processed foods, can manage an enlarged heart by lowering blood pressure, lowering cholesterol, and maintaining a healthy weight.

Can stress affect heart health in people with an enlarged heart?

Yes, stress can negatively affect heart health. It can increase blood pressure and heart rate and can worsen the symptoms. Managing stress through meditation, relaxation techniques, yoga, and exercise can be beneficial.

How important is regular exercise for someone with an enlarged heart?

Regular exercise is important, but it should be done under a professional’s supervision. Mild exercises or yoga techniques strengthen the heart and improve heart health. A doctor or physiotherapist can recommend best exercise according to the condition of the individual.

Summary

In people with an enlarged heart, the signs of myocardial infarction or heart attack can be more serious or similar to their typical symptoms. Common signs are chest pain, pressure, heaviness in the chest and referred pain to the jaw, neck, shoulders and arm. People might get symptoms like indigestion, heartburn, etc. Extreme fatigue after usual activity, tiredness, shortness of breath, and cold sweating are the common signs that indicate the heart has difficulty pumping blood efficiently. People may experience rapid heartbeats, dizziness, palpitations, confusion, and even fainting. Peripheral oedema, swelling in the legs, ankles, can be a sign of heart failure. These symptoms indicate an urgent medical treatment, or these are the warning signs for a myocardial infarction.