Why the study?
Does phonocardiography accurately predict the optimal AV delay compared to pulsed Doppler echocardiography in patients with complete AV block and an implanted DDD pacemaker?
Population
6 patients with complete AV block, normal left ventricular function and an implanted DDD pacemaker
Comparison
Phonocardiography vs Pulsed Doppler echocardiography
Design
Cross-sectional
Authors
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S1 inflection may identify optimal AV delay; hypothesis-generating pending prospective validation versus Doppler.
Does phonocardiography accurately predict the optimal AV delay compared to pulsed Doppler echocardiography in patients with complete AV block and an implanted DDD pacemaker?
Phonocardiography provides a simple and accurate method for predicting the optimal AV delay in patients with complete AV block and a DDD pacemaker, correlating well with standard Doppler echocardiography.
Miki et al. (2009) studied this question.
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