Cardiac resynchronization therapy has been an effective option in patients with advanced heart failure. However, 20 to 30% of the patients do not benefit from this therapy. Clinical, electrocardiographic and echocardiographic criteria have been studied in an attempt to select patients who will benefit from a cardiac resynchronization therapy, and the echocardiogram is important both in the sele...

INTRODUCTION AND OBJECTIVES The objective was to determine what percentage of patients admitted for heart failure met criteria for cardiac resynchronization therapy. METHODS The study involved registry data on heart failure admissions at 16 public hospitals in Andalusia, Spain between May and July 2004. Criteria for cardiac resynchronization therapy from American College of Cardiology and Ame...

a 55-year-old man referred for cardiac resynchronization therapy (crt) due to severe heart failure. a severe stenosis in the coronary sinus vein after the posterior branch disallowed the insertion of the lead. nevertheless, the stenosis was dilated and the left ventricle (lv) lead was implanted in the lateral marginal branch.

INTRODUCTION AND OBJECTIVES The effect of cardiac resynchronization therapy on antitachycardia pacing still has to be determined. PATIENTS AND METHOD A total of 490 heart failure patients with an indication for an implantable cardioverter-defibrillator participated in the VENTAK CHF/CONTAK CD study, a single-blind, randomized, placebo-controlled study. We compared antitachycardia pacing effic...

BACKGROUND Cardiac resynchronization reduces symptoms and improves left ventricular function in many patients with heart failure due to left ventricular systolic dysfunction and cardiac dyssynchrony. We evaluated its effects on morbidity and mortality. METHODS Patients with New York Heart Association class III or IV heart failure due to left ventricular systolic dysfunction and cardiac dyssyn...

Cardiac Resynchronization Therapy. Cardiac resynchronization therapy (CRT) is a recently developed approach to treat dilated heart failure with discoordinate contraction. Such dyssynchrony typically stems from electrical delay that then translates into mechanical delay between the septal and lateral walls. Over the past decade, many studies have examined the pathophysiology of cardiac dyssynchr...

Heart failure affects millions of patients all over the world, and its treatment is a major clinical challenge. Cardiac dyssynchrony is common among patients with advanced heart failure. Resynchronization therapy is a major advancement in heart failure management, but unfortunately not all patients respond to this therapy. Hence, many diagnostic tests have been used to predict the response and ...

Van der Wall EE, Schalij MJ, Bax JJ. Effect of postero-lateral scar tissue on clinical and echocardiographic improvement following cardiac resynchronization therapy. Circulation 2006;113:969–976. 5. Butter C, Auricchio A, Stellbrink C, Ding J, Yu Y, Kramer A, Huvelle E, Pochet T, Spinelli J, Fleck E. Effect of resynchronization therapy stimulation site on the systolic function of heart failure ...

Schalij MJ, Bax JJ. Optimal left ventricular lead position predicts reverse remodeling and survival after cardiac resynchronization therapy. J Am Coll Cardiol 2008;52: 1402–1409. 28. Yu Y, Kramer A, Spinelli J, Ding J, Hoersch W, Auricchio A. Biventricular mechanical asynchrony predicts hemodynamic effect of uniand biventricular pacing. Am J Physiol Heart Circ Physiol 2003;285:H2788–H2796. 29. ...