Characteristics and prognosis of pneumococcal endocarditis: a case-control study.

Area of Science:

• Cardiology
• Infectious Diseases
• Critical Care Medicine

Background:

• Pneumococcal endocarditis is considered rare, typically affecting patients with comorbidities but no pre-existing valve disease.
• Previous case series suggest rapid progression to heart failure and high mortality associated with pneumococcal endocarditis.

Purpose of the Study:

• To compare the clinical characteristics and outcomes of pneumococcal endocarditis with non-pneumococcal endocarditis.
• To investigate the progression and treatment requirements for pneumococcal endocarditis.

Main Methods:

• A case-control study was conducted between 1991 and 2013 at a single referral center.
• The study included 28 patients with pneumococcal endocarditis (cases) and 56 patients with non-pneumococcal endocarditis (controls).
• Statistical analysis compared comorbidities, disease progression, and treatment interventions between the two groups.

Main Results:

• Pneumococcal endocarditis was significantly associated with alcoholism, smoking, and the absence of prior valve disease.
• Patients with pneumococcal endocarditis experienced more rapid onset of heart failure and shock compared to controls.
• A higher proportion of pneumococcal endocarditis patients (64.3%) required early cardiac surgery, occurring much sooner after symptom onset.

Conclusions:

• Streptococcus pneumoniae is a cause of rapidly progressive endocarditis.
• Early cardiac surgery is frequently necessary for survival in patients with pneumococcal endocarditis.
• Despite aggressive management, in-hospital mortality rates were comparable between pneumococcal and non-pneumococcal endocarditis groups.