I30-I52: Other forms of heart disease

I33: Acute and subacute endocarditis

Acute and subacute endocarditis are conditions that involve inflammation of the inner layer of the heart, specifically the heart valves. These conditions are typically caused by bacteria entering the bloodstream and then settling in the heart, although they can also be caused by fungal infections or autoimmune conditions. The speed and severity of symptoms vary greatly. Acute endocarditis tends to come on suddenly and progress rapidly, causing severe illness. In contrast, subacute endocarditis typically starts more subtly and develops over weeks to a few months, sometimes making it harder to diagnose. Common symptoms include fever, chills, fatigue, aching joints and muscles, night sweats, shortness of breath, and paleness. Both conditions can lead to serious complications, such as heart failure or stroke, if not treated promptly. Lastly, it's worth noting that individuals with pre-existing heart conditions have a higher risk of developing these conditions.