Expanding benefits from cardiac resynchronization therapy to exercise‐induced left bundle branch block in advanced heart failure

Indications of cardiac resynchronization therapy (CRT) do not include exercise‐induced left bundle branch block, but functional impairment could be improved with CRT in such cases. A 57‐year‐old woman with idiopathic dilated cardiomyopathy (ejection fraction 23%) presented with New York Heart Associ...

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Veröffentlicht in:ESC Heart Failure 2020-02, Vol.7 (1), p.329-333
Hauptverfasser: Scolari, Fernando L., Silveira, Anderson D., Menegazzo, Willian R., Mendes, Ana Paula Chedid, Pimentel, Maurício, Clausell, Nadine, Goldraich, Livia A.
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container_end_page 333
container_issue 1
container_start_page 329
container_title ESC Heart Failure
container_volume 7
creator Scolari, Fernando L.
Silveira, Anderson D.
Menegazzo, Willian R.
Mendes, Ana Paula Chedid
Pimentel, Maurício
Clausell, Nadine
Goldraich, Livia A.
description Indications of cardiac resynchronization therapy (CRT) do not include exercise‐induced left bundle branch block, but functional impairment could be improved with CRT in such cases. A 57‐year‐old woman with idiopathic dilated cardiomyopathy (ejection fraction 23%) presented with New York Heart Association Class IV and recurrent hospitalizations. During heart transplant evaluation, a new onset of intermittent left bundle branch block was observed on the cardiopulmonary exercise test. CRT was implanted, and 97% resynchronization rate was achieved. In 12 month follow‐up, both clinical and prognostic exercise parameters improved. In patients with heart failure with reduced ejection fraction and no left bundle branch block at rest, exercise test can uncover electromechanical dyssynchrony that may benefit from CRT.
doi_str_mv 10.1002/ehf2.12580
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subjects Beta blockers
Bundle-Branch Block - etiology
Bundle-Branch Block - physiopathology
Bundle-Branch Block - therapy
Cardiac resynchronization therapy
Cardiac Resynchronization Therapy - methods
Cardiomyopathy
Cardiovascular disease
Case Report
Coronary vessels
Echocardiography
Ejection fraction
Electrocardiography
Exercise‐induced left bundle branch block
Female
Follow-Up Studies
Heart failure
Heart Failure - complications
Heart Failure - physiopathology
Heart Failure - therapy
Heart rate
Heart Rate - physiology
Humans
Maximum oxygen consumption
Middle Aged
Patients
Time Factors
Transplants & implants
Ultrasonic imaging
Ventilation
Ventricular Function, Left - physiology
title Expanding benefits from cardiac resynchronization therapy to exercise‐induced left bundle branch block in advanced heart failure
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