Discriminative Ability and Reliability of Transesophageal Echocardiography in Characterizing Cases of Cardiac Device Lead Vegetations Versus Noninfectious Echodensities.

BACKGROUND: Approximately one-third of cases of cardiovascular implantable electronic device (CIED) infection present as CIED lead infection. The precise transesophageal echocardiographic (TEE) definition and characterization of "vegetation" associated with CIED lead infection remain unclear. METHODS: We identified a sample of 25 consecutive cases of CIED lead infection managed at our institution between January 2010 and December 2017. Cases of CIED lead infection were classified using standardized definitions. Similarly, a sample of 25 noninfected patients who underwent TEE that showed a defined lead echodensity during the study period was included as a control group. TEEs were reviewed by 2 independent echocardiologists who were blinded to all linked patient demographic, clinical, and microbiological information. Reported echocardiographic variables of the infected vs noninfected cases were compared, and the overall diagnostic performance was analyzed. RESULTS: Descriptions of lead echodensities were variable and there were no significant differences in median echodensity diameter or mobility between infected vs noninfected groups. Among infected cases, blinded echocardiogram reports by either reviewer correctly made a prediction of infection in 6 of 25 (24%). Interechocardiologist agreement was 68%. Sensitivity of blinded TEEs ranged from 31.5% to 37.5%. CONCLUSIONS: Infectious vs noninfectious lead echodensities could not be reliably distinguished on the basis of size, mobility, and general shape descriptors obtained from a retrospective blinded TEE examination without knowledge of clinical and microbiological parameters. Therefore, a reanalysis of criteria used to support a diagnosis of CIED lead infection may be warranted.

Mobile echodensities on intracardiac device leads: Is it always a cause for concern?

BACKGROUND: Patients with cardiac implantable electronic devices (CIEDs) frequently undergo transthoracic echocardiography (TTE). As a result, incidental mobile echodensities (MEDs) attached to device leads are commonly detected. The aim of this study was to estimate the incidence and clinical outcomes of incidental MEDs on CIED leads. METHODS: A retrospective analysis performed between 2011 and 2018 identified 3548 TTE studies performed on 1849 patients with CIEDs. RESULTS: MEDs were identified in 30 patients (1.6%) without clinical suspicion of infective endocarditis (IE). Patients with incidental MEDs were apyrexial, and those tested demonstrated low inflammatory markers and negative blood cultures (BC). In this group, the majority (83%) of MEDs were in the right atrium and no MEDs were detected near the tricuspid valve. Transesophageal echocardiography (TEE) did not influence clinical outcomes. No patient required long-term antibiotics or lead extraction and no IE-related deaths were identified from electronic health records during a mean follow-up period of 43 months (1-89). In contrast, nine patients with suspected IE were all pyrexial with elevated inflammatory markers, had positive BC, and had proven IE. In these cases, the majority of MEDs were at the device lead/tricuspid valve interface. MEDs close to the tricuspid valve were strongly associated with IE (P < .0001). CONCLUSIONS: The incidence of MEDs on CIED leads detected on routine TTE was 1.6%. Conservative management of asymptomatic patients with normal inflammatory markers and BC without TEE, antibiotics, or lead extraction did not reveal any signal for long-term adverse events within the limitations of the study.

Lambl's Excrescences: An Enigma of Modern Diagnostic Cardiology.

Lambl's excrescences were first described in 1856 by a Bohemian physician, Vilém Dusan Lambl, and since then have gained widespread attention and controversy within the medical literature. Despite numerous case reports and observational studies, consensus on the significance and management of Lambl's excrescences remains sparse. We describe the case of a 48-year-old male who presented with recurrent embolic strokes. No underlying paroxysmal arrhythmia or inter-atrial shunt was identified, and the only pathological finding was a 1-mm aortic valve strand. We managed this patient successfully using a novel oral anticoagulant.