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Left ventricular Doppler diastolic filling patterns in patients with isolated left bundle branch block
A Sadaniantz1, L Saint Laurent
1Division of Cardiology, The Miriam Hospital, Brown University School of Medicine, Providence, Rhode Island 02906, USA.
The American Journal of Cardiology
|March 26, 1998
Summary
Isolated left bundle branch block (LBBB) significantly alters diastolic filling patterns. Echocardiography revealed lower E-wave velocity and altered filling dynamics in LBBB patients compared to healthy controls.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
- Echocardiography
Background:
- Left bundle branch block (LBBB) is a conduction abnormality affecting ventricular depolarization.
- Diastolic dysfunction can occur in various cardiac conditions, impacting ventricular filling.
- Understanding LBBB's specific impact on diastolic function is crucial for patient management.
Purpose of the Study:
- To investigate the effects of isolated left bundle branch block (LBBB) on diastolic filling patterns.
- To compare echocardiographic diastolic parameters between subjects with LBBB and healthy controls.
Main Methods:
- Echocardiography was used to assess diastolic filling patterns.
- Fourteen subjects with isolated LBBB and 16 healthy controls were evaluated.
- Key Doppler parameters including E-wave velocity, E/A ratio, and deceleration slope were measured.
Main Results:
- Subjects with LBBB demonstrated significantly lower maximum E-wave velocity compared to controls.
- The E/A ratio and deceleration time of the E wave were reduced in the LBBB group.
- Doppler-derived diastolic filling patterns were markedly altered in individuals with isolated LBBB.
Conclusions:
- Isolated LBBB significantly impacts left ventricular diastolic filling.
- These alterations in diastolic function may have clinical implications for patients with LBBB.
- Echocardiography is effective in detecting LBBB-induced changes in diastolic patterns.