Key result
Late potentials on signal-averaged electrocardiogram were detected in 46.2% of patients with pulmonary sarcoidosis without obvious cardiac manifestations compared to 5.8% of normal controls (p<0.0001).
Why the study?
Does signal averaged electrocardiogram (SAECG) detect latent cardiac conduction abnormalities in patients with pulmonary sarcoidosis without obvious cardiac manifestations?
Observational (n=114)
Does signal averaged electrocardiogram (SAECG) detect latent cardiac conduction abnormalities in patients with pulmonary sarcoidosis without obvious cardiac manifestations?
Absolute Event Rate: 46.2% vs 5.8%
p-value: p=<0.0001
A high prevalence of late potentials on SAECG in patients with pulmonary sarcoidosis without obvious cardiac manifestations suggests the presence of latent minute conduction abnormalities and potential myocardial fibrosis.
Late potentials suggest latent conduction abnormalities in pulmonary sarcoidosis; leaves open whether SAECG screening improves risk stratification or outcomes.
BACKGROUND: Electrocardiographic conduction abnormalities including development of atrioventricular block, bundle branch block or ventricular arrhythmias are characteristic manifestations of cardiac sarcoidosis (CS). The present study seeks to show the minute conduction abnormality by detection of late potentials (LP) on signal averaged electrocardiogram (SAECG). METHODS AND RESULTS: Ten patients with CS, 52 patients with pulmonary sarcoidosis (PS) but no obvious cardiac manifestations and 52 normal controls were studied. All participants underwent SAECG to detect LP. In patients with CS (the CS group), LP were detected in 8 patients (80%). In 52 patients with PS, LP were detected in 25 patients (46.2%, PS-LP(+) group), comparing only 3 (5.8%) of normal controls (p<0.0001). The remaining 27 patients with PS with negative LP were classified in the PS-LP(-) group. In the CS group, premature ventricular contraction frequency on Holter's monitoring and plasma B-type natriuretic peptide concentrations were significantly higher than those in the PS group. However, no significant difference in these parameters between PS-LP(+) and PS-LP(-) groups were found. CONCLUSIONS: In the PS patients without obvious cardiac manifestations, LP were detected as high as 46.2%, suggesting latent minute conduction abnormality. The higher incidence of LP in PS might be considered as an expression of latent myocardial fibrosis. Close follow-up is needed in these patients.
No takes yet. Share an insight, caveat, or question.
Yodogawa et al. (2007) conducted an observational in Pulmonary sarcoidosis (n=114). Pulmonary sarcoidosis without obvious cardiac manifestations vs. Normal controls was evaluated on Detection of late potentials on signal averaged electrocardiogram (p=<0.0001). Late potentials on signal-averaged electrocardiogram were detected in 46.2% of patients with pulmonary sarcoidosis without obvious cardiac manifestations compared to 5.8% of normal controls (p<0.0001).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: