Obesity significantly impacts cardiovascular health, contributing to a range of conditions that increase the risk of heart disease and stroke.
- Hypertension: The increased body mass in obesity necessitates a larger supply of blood to adipose tissues, elevating blood pressure due to the added demand on the heart.
- Cardiomyopathy: Elevated cardiac output (CO) in response to increased body mass leads to stress on the ventricular walls and diastolic dysfunction. This condition reflects the heart's impaired ability to relax and fill during the rest phase of the cardiac cycle.
- Ischemic Heart Disease: Obesity contributes to the development of coronary artery disease by promoting atherosclerosis (the buildup of fats, cholesterol, and other substances in and on the artery walls), which can restrict blood flow to the heart.
- Increased Blood Volume and Decreased Systemic Vascular Resistance (SVR): These factors lead to increased cardiac output, placing additional workload on the heart. This results in compensatory left ventricular hypertrophy, characterized by the thickening of the heart's left ventricle muscle, which can eventually lead to diastolic dysfunction.
- Arrhythmias: Obesity-related factors such as hypoxemia (low blood oxygen levels), ventricular hypertrophy (enlarged heart due to increased workload), hypokalemia (low potassium levels), coronary artery disease, elevated catecholamine levels (stress hormones), and fatty infiltration of the heart's conduction and pacing systems, contribute to the development of arrhythmias. Moreover, cor pulmonale (right heart failure due to chronic lung disease) can further complicate cardiovascular function in obese patients.
