Ischemic heart diseases

Ischemic Heart Disease (IHD), also known as coronary artery disease (CAD) or coronary heart disease, encompasses a range of conditions characterized by reduced blood flow to the heart muscle due to blockage of the coronary arteries. This reduction in blood flow can lead to chest pain (angina), shortness of breath, and other symptoms. In severe cases, it can cause a heart attack, which is a medical emergency.

Causes

The primary cause of IHD is atherosclerosis, a process in which plaque (made up of fat, cholesterol, calcium, and other substances found in the blood) builds up inside the coronary arteries. This buildup narrows the arteries, reducing blood flow to the heart muscle. Risk factors for atherosclerosis and IHD include smoking, high blood pressure, high cholesterol, diabetes, obesity, and a sedentary lifestyle.

Symptoms

Symptoms of IHD can vary but often include chest pain or discomfort (angina), which may radiate to the arms, shoulder, neck, teeth, jaw, belly area, or back. Other symptoms may include shortness of breath, fatigue, and nausea. Symptoms can be more subtle in women and may include abdominal pain or discomfort, dizziness, and fatigue.

Diagnosis

Diagnosis of IHD involves a combination of patient history, physical examination, and various tests. These tests can include electrocardiograms (ECG), echocardiograms, stress tests, coronary angiography, and blood tests.

Treatment

Treatment for IHD aims to manage symptoms and reduce the risk of complications such as heart attacks. Lifestyle changes such as diet, exercise, and smoking cessation are crucial. Medications may include antiplatelet drugs, cholesterol-lowering drugs, beta-blockers, and angiotensin-converting enzyme (ACE) inhibitors. In some cases, procedures like angioplasty or coronary artery bypass grafting (CABG) may be necessary to improve blood flow to the heart.

Prevention

Prevention of IHD involves controlling risk factors through lifestyle changes and, in some cases, medication. This includes maintaining a healthy weight, eating a balanced diet, exercising regularly, avoiding tobacco, and managing conditions like hypertension and diabetes.

Epidemiology

IHD is a leading cause of death worldwide. The prevalence of IHD varies by region, age, sex, and socioeconomic status. It is more common in older adults, men, and in high-income countries, although rates in low- and middle-income countries are rising.