LV dysfunction
These results suggest that mild bradycardia is       energetically advantageous and does not decrease myocardial contractility and       performance, whereas pacing-induced tachycardia worsens cardiac mechanics and       energetics in patients with LV dysfunction.
These results suggest that mild bradycardia is       energetically advantageous and does not decrease myocardial contractility and       performance, whereas pacing-induced tachycardia worsens cardiac mechanics and       energetics in  @OBJECT$   @PREDICAT$   @SUBJECT$ .