IX: Diseases of the circulatory system

The diseases of the circulatory system, a group of conditions which primarily affect the heart and blood vessels, are complex and varying in nature. This group includes conditions such as coronary artery disease, heart failure, and hypertension, among others. These diseases commonly originate due to damage to the heart itself or the blood vessels, often because of unhealthy lifestyle choices like a poor diet or physical inactivity, or medical conditions like high blood pressure, diabetes, or high cholesterol. Some of these conditions may be genetic as well. Symptoms often range from chest pain, shortness of breath, and dizzy spells to more severe signs like heart palpitations and fainting. Disease progression can be swift or slow based on the condition and the individual, potentially leading to serious complications like stroke, heart attack, or even death. The circulatory system, comprising the heart, blood vessels, and blood, is understandably the primary system affected.