Why the study?
The prevalence of interventricular and intraventricular contractile dyssynchrony in heart failure patients with normal or prolonged QRS duration was unclear.
What is the prevalence of interventricular and intraventricular dyssynchrony in heart failure patients across different QRS durations?
What is the prevalence of interventricular and intraventricular dyssynchrony in heart failure patients across different QRS durations?
A substantial proportion of heart failure patients exhibit ventricular dyssynchrony even with normal or slightly prolonged QRS duration, highlighting the value of echocardiography and TDI beyond ECG criteria.
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Dyssynchrony occurs across QRS durations in HF; leaves open its role in refining CRT selection beyond ECG criteria.
Stefano Ghio (2004) studied this question.
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