scholarly journals Relationship between R-R interval variation and left ventricular function in sinus rhythm and atrial fibrillation as estimated by means of heart rate variability fraction

2011 ◽  
Vol 19 (5) ◽  
pp. 538-545 ◽  
Author(s):  
Maciej Sosnowski ◽  
Barbara Korzeniowska ◽  
Peter W. Macfarlane ◽  
Michał Tendera
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Sinus Rhythm ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Left Ventricular

Relative efficacy of oral verapamil and digoxin alone and in combination for the treatment of patients with chronic atrial fibrillation

1988 ◽  
Vol 74 (4) ◽  
pp. 351-357 ◽  
Author(s):  
S. M. Pomfret ◽  
C. R. W. Beasley ◽  
V. Challenor ◽  
S. T. Holgate
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Chronic Atrial Fibrillation ◽  
Left Ventricular ◽  
High Serum ◽  
Controlled Study ◽  
Double Blind ◽  
Oral Verapamil

1. The efficacy of verapamil alone, or in combination with digoxin, was compared with digoxin alone in eight patients with chronic atrial fibrillation in this double-blind placebo-controlled study. 2. After 2 weeks on each treatment regimen, heart rate at rest and during progressive load treadmill exercise, left ventricular function at rest and nocturnal heart rate were measured. 3. Oral verapamil alone at a dose of 80 mg three times daily, or 40 mg of verapamil three times daily in combination with 0.25 mg of digoxin daily, was superior to digoxin alone in doses associated with high serum digoxin concentrations (mean ± sem 1.6 ± 0.3 μg/l). This superiority manifested as greater control of heart rate during work rates equivalent to regular daily activities, and was not associated with deterioration in left ventricular function or worsening nocturnal bradycardia. 4. We conclude that the treatment of choice in patients with chronic atrial fibrillation is either 80 mg of verapamil three times daily or 40 mg of verapamil three times daily in combination with digoxin.

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