Utility of Echocardiogram in Neutropenic Patients with Gram-Positive Bacteremia: A Retrospective Study

Hemato-oncology patients are vulnerable to bloodstream infections due to immunocompromised state and use of intravascular catheters. Data regarding risk of infective endocarditis (IE) among those with gram-positive bacteremia are limited. We aimed to evaluate the incidence of IE among neutropenic hemato-oncology patients and explore the yield of echocardiogram in this population.

We conducted a single retrospective study of all hospitalized hemato-oncology neutropenic patients with gram-positive blood cultures between 2007 and 2021. Data regarding patients' characteristics, blood cultures, and echocardiogram were collected.

The study included 241 patients, with 283 isolates. Coagulase-negative Staphylococcus (CONS) was the most commonly isolate found, followed by Streptococcus viridans. Transthoracic echocardiography (TTE) was performed in 45% of patients overall, of which 5.8% had additional transesophageal echocardiogram (TEE). Only a single case of IE was identified in a 47-year-old multiple myeloma patient with neutropenic fever, S. viridans bacteremia, and stroke caused by septic emboli. TTE and TEE failed to demonstrate valvular pathology consistent with IE.

In our experience, the yield of echocardiogram in hemato-oncological neutropenic patients with bacteremia is extremely low, owing to reduced probability of IE in this population, and thus could be avoided in most cases.