Cardiology is the study of the cardiovascular system, and it is also called the circulatory system or vascular system. It is a specialized branch of medicine focused on the diagnosis, treatment, and prevention of diseases and conditions related to the heart and blood vessels. The human heart is a vital organ responsible for pumping blood throughout the body, supplying oxygen and nutrients to tissues, and maintaining overall physiological balance. Due to the critical role of the cardiovascular system, any disruption in heart function can have serious health consequences, ranging from mild fatigue to life-threatening conditions such as heart attacks or heart failure.
Cardiology plays a crucial role in modern medicine, given that cardiovascular diseases (CVDs) remain one of the leading causes of morbidity and mortality worldwide. According to the World Health Organization (WHO), an estimated 17.9 million people die each year from CVDs, accounting for 32% of global deaths. Conditions such as coronary artery disease, arrhythmias, valvular heart disease, and congenital heart defects require specialized medical attention. Cardiologists not only treat these conditions but also emphasize preventive care, helping patients reduce risk factors such as hypertension, high cholesterol, smoking, obesity, and sedentary lifestyles.