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What is Heart?
The heart is about the size of a fist which pumps blood throughout the body and is the main organ of your circulatory system. It’s made of muscles and tissue, making it a powerful organ.
A heart has four chambers that hold blood for a short time before pumping it out. Electrical impulses cause your heart to beat, moving blood through these chambers. The brain and nervous system control how your heart functions.
What is the Function of the Heart?
The main function of the heart is to pump blood throughout the body, delivering oxygen and nutrients to tissues and organs while removing carbon dioxide and waste products.
The primary functions of heart include:
- It helps maintain adequate blood pressure to ensure efficient delivery of oxygen and nutrients.
- It adjusts blood flow to meet the changing demands of the body's tissues and organs.
- It ensures that oxygen-rich blood from the lungs and oxygen-poor blood from the body are properly routed through the heart and lungs for oxygenation.
- The heart facilitates the circulation of hormones, immune cells, and other substances essential for maintaining health and homeostasis.
What are Heart Diseases?
Various conditions impacting the heart are collectively known as heart disease.
Heart diseases include:
- Blood vessel disease, such as coronary artery disease
- Irregular heartbeats (arrhythmias)
- Heart problems you're born with (congenital heart defects)
- Disease of the heart muscle
- Heart valve disease
Adopting healthy lifestyle choices can prevent many forms of heart disease.
What are The Types of Heart Diseases?
1. Coronary Artery Disease (CAD)
Coronary Artery Disease (CAD) is the most common heart problem. With CAD, blockages may form in coronary arteries, which supply blood to the heart. This reduces blood flow to the heart muscle, depriving it of necessary oxygen. CAD typically begins due to atherosclerosis, a condition often referred to as hardening of the arteries.
2. Heart Arrhythmias
It is a condition where the heart beats irregularly, either too fast, too slow, or with an uneven rhythm. This occurs when the electrical signals that coordinate heartbeats malfunction, causing the heart to beat improperly.
3. Heart Failure
It is a chronic condition where the heart is unable to pump blood effectively to meet the body's needs. This can result from the heart being too weak or too stiff to function properly.
Symptoms often include shortness of breath, fatigue, and fluid buildup in the legs, ankles, and lungs. Heart failure can develop due to various underlying conditions, such as coronary artery disease, high blood pressure, or previous heart attacks.
4. Heart Valve Disease
Heart valve disease occurs when one or more of the heart's valves don't function properly, disrupting blood flow through the heart. This can happen when the valves don't open fully (stenosis), don't close properly (regurgitation), or both.
As a result, the heart must work harder to pump blood, which can lead to symptoms such as fatigue, shortness of breath, and swelling in the legs and feet. Heart valve disease can be congenital or develop later in life due to conditions like infections, aging, or other heart-related issues
5. Pericardial Disease
Pericardial disease refers to conditions that affect the pericardium, the thin sac-like membrane surrounding the heart. This disease can lead to inflammation (pericarditis), fluid buildup (pericardial effusion), or thickening and restriction (constrictive pericarditis) of the pericardium. Symptoms may include chest pain, shortness of breath, and swelling of the abdomen or legs.
6. Cardiomyopathy (Heart Muscle Disease)
Cardiomyopathy is a heart muscle disease characterized by the muscle becoming enlarged, thickened, or rigid. This condition weakens the heart's ability to pump blood effectively and can lead to symptoms such as fatigue, shortness of breath, swelling in the legs, and irregular heartbeats.
There are different types of cardiomyopathy, including dilated cardiomyopathy (enlarged heart chambers), hypertrophic cardiomyopathy (thickened heart muscle), and restrictive cardiomyopathy (stiffened heart muscle).
7. Congenital Heart Disease
Congenital heart disease (CHD) includes different heart defects present from birth. These defects affect the structure of the heart and how it functions. They can involve abnormalities in the heart's walls, valves, or blood vessels, impacting blood flow through the heart. CHD can vary from mild, requiring little to no intervention, to severe, necessitating surgical correction early in life.
Blood Test for Heart Diseases
Blood tests can provide valuable insights into heart health, with certain substances indicating the risk of developing fatty deposits known as plaques in the arteries. However, it's important to note that a single blood test alone cannot determine the risk of heart disease.
1. Cholesterol Test
A cholesterol test, also called a lipid panel or lipid profile, assesses the fats present in the blood. The results may help predict the likelihood of experiencing a heart attack or other cardiovascular conditions. The test typically measures:
- Total cholesterol: This reflects the overall amount of cholesterol in the blood, where high levels can elevate the risk of heart disease.
- Low-density lipoprotein (LDL) cholesterol: Also Known as "bad" cholesterol. Excess LDL cholesterol may lead to plaque buildup in the arteries, restricting blood flow and causing heart and vascular problems.
- High-density lipoprotein (HDL) cholesterol: Referred to as "good" cholesterol because it transports LDL ("bad") cholesterol away from the arteries, maintaining arterial openness and smooth blood flow.
- Triglycerides: Another type of fat in the blood, elevated triglyceride levels may heighten the risk of heart disease.
- Non-HDL cholesterol: Calculated by subtracting HDL cholesterol from total cholesterol. Non-HDL cholesterol is involved in arterial plaque formation and may serve as a more accurate indicator of risk compared to total cholesterol or LDL cholesterol alone.
2. High-sensitivity C-reactive protein
The liver produces C-reactive protein (CRP) in response to injury or infection, triggering inflammation, which involves swelling inside the body. Inflammation is crucial in the development of arterial plaques, known as atherosclerosis.
High-sensitivity CRP (hs-CRP) tests are used to assess the risk of heart disease before symptoms appear. Elevated hs-CRP levels are associated with increased risks of heart attack, stroke, and heart disease.
3. Lipoprotein (a)
Lipoprotein (a), or Lp(a), is a subtype of LDL cholesterol associated with increased risk of heart disease. Doctors may advise an Lp(a) test if you have a risk of heart disease or heart disease despite normal cholesterol levels, or if there's a family history of early-onset heart disease, sudden death, or stroke.
How can you Prevent Heart Diseases?
The lifestyle adjustments effective in managing heart disease may also help in its prevention.
Follow these heart-healthy guidelines to prevent heart diseases:
- Quit smoking.
- Consume a diet low in salt and saturated fat.
- Exercise for at least 30 minutes daily, most days of the week.
- Maintain a healthy weight.
- Manage and reduce stress levels.
- Control conditions like high blood pressure, high cholesterol, and diabetes.
- Ensure adequate sleep. Adults should aim for 7 to 9 hours nightly.
