Open AccessAssessment of Left Ventricular Dyssynchrony in Patients With Heart Failure and Normal QRS Duration
Author(s) -
Narayan Vidya,
Varadarajan Padmini,
Pai Ramdas G.
Publication year - 2007
Publication title -
congestive heart failure
Language(s) - English
Resource type - Journals
eISSN - 1751-7133
pISSN - 1527-5299
DOI - 10.1111/j.1527-5299.2007.07154.x
Subject(s) - medicine , qrs complex , cardiology , heart failure , ejection fraction , cardiac resynchronization therapy , ventricular dyssynchrony , ambulatory , duration (music) , art , literature
Cardiac resynchronization therapy (CRT) is an important component of heart failure therapy in patients with a left ventricular ejection fraction <35%, class III or ambulatory class IV symptoms, and a QRS duration >120 ms. The QRS duration criterion for patient selection is imperfect. About 30% of patients with an increased QRS duration are nonresponders to CRT and many with a normal QRS duration with mechanical dyssynchrony respond to CRT. The authors review the currently available echocardiographic tools for the assessment of ventricular dyssynchrony in patients with heart failure.