Trial finds intravenous sotalol may control heart rate rapidly in atrial fibrillation where long-term use is intended

2004 ◽  
Vol 8 (2) ◽  
pp. 143-144
1986 ◽  
Vol 27 (4) ◽  
pp. 548-559
Author(s):  
Charles E. Short ◽  
Jean-Louis Stauffer ◽  
Gary Goldberg ◽  
Outi Vainio

Author(s):  
Amit Frenkel ◽  
Yoav Bichovsky ◽  
Natan Arotsker ◽  
Limor Besser ◽  
Ben-Zion Joshua ◽  
...  

Background: Beta blockers, mainly propranalol, are usually administered to control heart rate in patients with thyrotoxicosis, especially when congestive heart failure presents. However, when thyrotoxicosis is not controlled, heart rate may be difficult to control even with maximal doses of propranolol. This presentation alerts physicians to the possibility of using ivabradine, a selective inhibitor of the sinoatrial pacemaker, for the control of heart rate. Case presentation: We present a 37-year-old woman with thyrotoxicosis and congestive heart failure whose heart rate was not controlled with a maximal dose of beta blockers during a thyroid storm. The addition of ivabradine, a selective inhibitor of the sinoatrial pacemaker, controlled her heart rate within 48 hours. Conclusion: Ivabradine should be considered in patients with thyrotoxicosis, including those with heart failure, in whom beta blockers are insufficient to control heart rate


1981 ◽  
Vol 240 (6) ◽  
pp. H874-H880 ◽  
Author(s):  
P. D. Gupta ◽  
M. Singh

We investigated the mechanisms underlying heart rate changes resulting from systemic hypoxia in anesthetized artificially ventilated dogs with low control heart rate (less than or equal to 93 beats/min). We observed that systemic hypoxia evoked tachycardia in intact dogs that was not significantly different from that evoked in dogs with beta-adrenergic blockade (BB). Also, tachycardia elicited in dogs with BB plus spinal section at C3 (BBSS) was significantly greater than in dogs with BBSS plus bilateral section of carotid sinus nerves. Furthermore, under various anesthetics, intracarotid injection of sodium cyanide induced a tachycardia response in dogs with low control heart rate (less than or equal to 97 beats/min) and a bradycardia response in dogs with high control heart rate (greater than or equal to 130 beats/min). These results suggest that 1) when the resting cardiac parasympathetic tone is high, systemic hypoxia evokes tachycardia which is mediated predominantly through efferent vagus nerves and 2) the stimulation of carotid chemoreceptors causes excitation of both cardioacceleratory and cardioinhibitory reflexes, the resultant response being dependent on the prevalent autonomic drive.


2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
R Vidal-Perez ◽  
R Agra-Bermejo ◽  
D Pascual-Figal ◽  
F Gude Sampedro ◽  
C Abou Jokh ◽  
...  

Abstract Background The prognostic impact of heart rate (HR) in acute heart failure (AHF) patients is not well known especially in atrial fibrillation (AF) patients. Purpose The aim of the study was to evaluate the impact of admission HR, discharge HR, HR difference (HRD) (admission- discharge) in AHF patients with sinus rhythm (SR) or AF on long- term outcomes. Methods We included 1398 patients consecutively admitted with AHF between October 2013 and December 2014 from a national multicentric, prospective registry. Logistic regression models were used to estimate the association between admission HR, discharge HR and HR difference and one- year all-cause mortality and HF readmission. Results The mean age of the study population was 72±12 years. Of these, 594 (42.4%) were female, 655 (77.8%) were hypertensive and 655 (46.8%) had diabetes. Among all included patients, 745 (53.2%) had sinus rhythm and 653 (46.7%) had atrial fibrillation. Only discharge HR was associated with one-year all-cause mortality (Relative risk (RR)= 1.182, confidence interval (CI) 95% 1.024–1.366, p=0.022) in SR. In AF patients discharge HR was associated with one-year all-cause mortality (RR= 1.276, CI 95% 1.115–1.459, p≤0.001). We did not observe a prognostic effect of admission HR or HRD on long-term outcomes in both groups. This relationship is not dependent on left ventricular ejection fraction (Figure 1) Effect of post-discharge heart rate Conclusions In AHF patients lower discharge HR, neither the admission nor the difference, is associated with better long-term outcomes especially in AF patients Acknowledgement/Funding Heart Failure Program of the Red de Investigaciόn Cardiovascular del Instituto de Salud Carlos III, Madrid, Spain (RD12/0042) and the Fondo Europeo de


2007 ◽  
Vol 16 ◽  
pp. S185
Author(s):  
H. Branagan ◽  
R. Braaksma ◽  
C. Jenkins ◽  
L. Hanekom ◽  
B. Venkatesh ◽  
...  

2013 ◽  
Vol 34 (suppl 1) ◽  
pp. P1534-P1534
Author(s):  
M. De Antonio ◽  
J. Lupon ◽  
M. Domingo ◽  
E. Zamora ◽  
B. Gonzalez ◽  
...  

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