A patient is described who developed symptomatic sinus bradycardia as low as 20 beats per minute and sinus arrest of up to 4.4 seconds while receiving guanethidine, 75 mg daily. Tbe bradycardia resolved following discontinuation of the drug and reappeared upon challenge with i t Intrinsic disease of the sinoatrial and atrioventricular nodes was evidenced 3 weeks following discontinuation of tbe...

A patient is described who developed symptomatic sinus bradycardia as low as 20 beats per minute and sinus arrest of up to 4.4 seconds while receiving guanethidine, 75 mg daily. The bradycardia resolved following discontinuation of the drug and reappeared upon challenge with it. Intrinsic disease of the sinoatrial and atrioventricular nodes was evidenced 3 weeks following discontinuation of the...

A 58-year-old man without comorbidity presented with high fever, chills, and myalgia. Examination showed right inguinal lymphadenopathy; an eschar was present in the ankle region (Figure 1). His blood pressure was 100/60 mmHg, heart rate was 70 beats/minute, and the electrocardiogram (ECG) showed normal sinus rhythm (Figure 2A). The platelet count was 74,000/μL, total bilirubin was 1.3 mg/dL, a...

In 61 patients sinus node function was tested by programmed (sinoatrial conduction time, SACT) and overdrive atrial pacing (sinus node recovery time, SRT). In the control group (N = 20), mean sinus cycle length was 773 +/- 140.2 msec, mean absolute SRT 1044 +/- 215.8 msec [corrected SRT (CSRT) 270 +/- 112.5 msec; mean +/- SD] and calculated SACT was 82 +/-19.2 msec. The upper limit of normal SA...

introduction: previous studies have raised the probably of cardiac manifestation in tramadol poisoning. however, conclusive information on electrocardiographic (ecg) abnormalities of tramadol overdose remains to be explained. therefore, the present study aimed to evaluate the epidemiology of ecg abnormalities in tramadol poisoned patients. methods: in a prospective cross-sectional study, all pa...

A case of sinus bradycardia with cardiac asystole was described in this journal (Pearson, 1945). The subsequent history and the post-mortem findings are now recorded. The patient was a woman aged 52 years who had been under observation since February 1943. Her pulse rate varied between 16 and 30 and her main symptoms were attacks of unconsciousness, resembling Stokes-Adams attacks; these were s...

OBJECTIVE The aim of this study is to review the current management and outcomes of fetal bradycardia in 9 Spanish centers. METHODS Retrospective multicenter study: analysis of all fetuses with bradycardia diagnosed between January 2008 and September 2010. Underlying mechanisms of fetal bradyarrhythmias were studied with echocardiography. RESULTS A total of 37 cases were registered: 3 sinus...

Sinus bradycardia may be seen commonly in healthy individuals and athletes without any significance. It may also occur in cardiovascular and systemic diseases. Sinus bradycardia is a common clinical sign in patients with anorexia nervosa. However, it is not usual to experience a patient with severe bradycardia who was diagnosed to have anorexia nervosa after being treated with a permanent pacem...

A hypermagnesemic adult sheep during an experimental study showed gastraointestinal and respiratory changes along with cardiovascular alterations included of obvious bradycardia and heart block. In order to save the animal from fatal bradycardia, atropine sulfate was administrated instatntly at one dose 0.3 mg/kg. The animal was survived and rhythm returned to sinus rhythm from marked bradycard...