Major Cardiovascular Diseases

Introduction

Cardiovascular diseases (CVDs) are the leading cause of death in the United States. Understanding the major types of CVDs, their causes, symptoms, and risk factors is essential for personal health management and prevention.

Hypertension

Definition and Description

• Hypertension is persistently elevated blood pressure against the walls of arteries.

• Often called the "silent killer" because it may not show obvious symptoms.

• Blood pressure is measured in millimeters of mercury (mm Hg) and recorded as systolic/diastolic.

Blood Pressure Categories

• Symptoms: Damages blood vessels, leading to other CVDs.

Example

A patient with a blood pressure reading of 150/90 mm Hg is diagnosed with hypertension, even if no symptoms are present.

Atherosclerosis

Definition and Description

• Atherosclerosis is the hardening and narrowing of arteries due to plaque deposits (cholesterol, fat, and other substances).

• Plaque buildup restricts blood flow and may cause arteries to burst if weakened.

Process of Atherosclerosis

• Symptoms: Pain, numbness, and tissue death in affected areas.

Types of Atherosclerosis

Coronary Heart Disease: Major Symptoms

Angina Pectoris

• Occurs when an artery is partially blocked, causing temporary discomfort or pain in the chest.

• Symptoms: Shortness of breath, pain, pressure in chest.

Myocardial Infarction (Heart Attack)

• Occurs when an artery is completely blocked, causing permanent heart muscle death.

• Symptoms: Severe chest pain, shortness of breath, pain radiating to arm or jaw.

Blood Clots in Coronary Heart Disease

Stroke

Definition and Description

• A stroke occurs when blood flow to the brain is blocked, leading to brain tissue death.

• Symptoms include impairment in speech, memory, movement, and paralysis.

Types of Stroke

• Aneurysm: A weak spot in a blood vessel wall that may burst and cause hemorrhagic stroke.

Example

A patient with sudden right arm paralysis and difficulty speaking is diagnosed with an ischemic stroke after imaging reveals a blocked artery in the brain.

Cardiomyopathy (Congestive Heart Failure)

Definition and Description

• Cardiomyopathy is a condition caused by heart muscle death and enlargement.

• Heart cannot pump blood effectively, leading to Congestive Heart Failure (CHF).

• Fluid backs up into lungs and other tissues.

• Symptoms: Swelling in legs, ankles, and feet; shortness of breath; progressive fatigue.

Example

A patient with swelling in the lower extremities and shortness of breath is diagnosed with congestive heart failure due to weakened heart muscle.

Key Terms and Definitions

• Hypertension: High blood pressure.

• Atherosclerosis: Hardening and narrowing of arteries due to plaque buildup.

• Angina Pectoris: Chest pain due to reduced blood flow to the heart.

• Myocardial Infarction: Heart attack; death of heart muscle due to blocked artery.

• Stroke: Brain tissue death due to interrupted blood supply.

• Cardiomyopathy: Disease of the heart muscle leading to heart failure.

• Thrombus: Stationary blood clot.

• Embolus: Moving blood clot.

• Aneurysm: Weak spot in a blood vessel wall.

Summary Table: Major Cardiovascular Diseases

Formulas and Equations

• Blood Pressure:

Additional info:

• Prevention of CVDs includes regular exercise, healthy diet, avoiding tobacco, and managing stress.

• Early detection and management of risk factors are crucial for reducing morbidity and mortality.