Dermatologic Conundrum: A Cardiac Condition Masqueraded as a Dermatologic Distraction

Area of Science:

• Cardiology
• Infectious Diseases
• Dermatology

Background:

• Subacute bacterial endocarditis (SBE) often presents with nonspecific symptoms, leading to diagnostic delays.
• Early recognition is crucial for effective treatment and preventing complications such as embolic events and heart failure.

Observation:

• A 38-year-old male presented with extreme pain, a petechial rash, fatigue, fevers, and weight loss.
• Initial symptoms were misdiagnosed as herpes zoster, delaying the diagnosis of infective endocarditis (IE).
• Cardiac examination revealed murmurs, and echocardiography showed a bicuspid aortic valve with mitral valve vegetation.

Findings:

• Blood cultures identified *Streptococcus mitis* and *Streptococcus oralis*, confirming IE.
• The patient was diagnosed with SBE, likely originating from poor dentition.
• An unusual, progressive petechial rash on the lower extremities was the primary presenting sign.

Implications:

• This case underscores the importance of considering infective endocarditis in patients with unexplained systemic symptoms and unusual skin manifestations.
• The diagnostic challenge posed by nonspecific symptoms and atypical presentations of IE is highlighted.
• Prompt and accurate diagnosis of IE is critical to prevent severe morbidity and mortality.