Disease

Disease is a general medical term for any condition that impairs the normal functioning of part or all of the body, producing recognisable signs and symptoms. In clinical usage, it encompasses both congenital conditions (present from birth, due to genetic factors or developmental abnormalities) and acquired conditions (developing during a person’s lifetime as a result of infection, injury, ageing, or lifestyle factors).

In cardiovascular medicine, the term appears in compound forms describing specific conditions, such as coronary artery disease (narrowing of the arteries supplying the heart), congenital heart disease (structural abnormalities of the heart present at birth), valvular heart disease (abnormalities of the heart valves), and vascular disease (disease affecting arteries, veins, or lymphatic vessels). These represent different categories of cardiovascular disease, the umbrella term for all conditions of the heart and blood vessels.

Disease is technically distinct from injury (which implies a specific physical insult such as trauma) and syndrome (a recognised collection of signs and symptoms that may have multiple causes). In practice, these distinctions are not always sharp, and the same condition may be described differently by different clinicians.

For cardiac arrest survivors, identifying the specific underlying disease is a central goal of post-arrest investigation. The nature of the disease determines treatment decisions, informs the risk of recurrence, and determines whether family members should be screened for inherited conditions.