Which conditions are commonly addressed by cardiologists?

Cardiologists specialize in diagnosing and treating diseases related to the heart and blood vessels. Heart disease encompasses a wide range of conditions that affect the heart's structure and function, such as coronary artery disease, heart attacks, and heart failure. Arrhythmias refer to abnormal heart rhythms, which can lead to serious complications if not properly managed. These two areas—heart disease and arrhythmias—are fundamental aspects of cardiology, making them the primary conditions addressed by cardiologists.

The other options, while important in the overall context of health, are typically managed by other specialists. Diabetes and obesity fall under the domain of endocrinology and nutrition, chronic respiratory diseases are the focus of pulmonologists, and kidney disorders are primarily treated by nephrologists. Therefore, the focus of cardiology on heart-related ailments explains why heart disease and arrhythmias are the correct answer to this question.