Not Simply Sinus Tachycardia

Postpartum Sinus Tachycardia

Pregnancy is a time of immense physiological and immunological change. Perhaps no organ system undergoes more adaptations then the cardiovascular. Increased cardiac output, increased intravascular volume, hyper coagulability, and decreased systemic vascular resistance, are four essential alterations [1]. Additionally, a rise in pulse rate of ten to twenty beats per minute is usually seen. Furth...

Is it really sinus tachycardia?

A 56-year-old male with a history of hypertension and coronary disease was admitted after complaining of mild shortness of breath and palpitations. He had undergone coronary bypass surgery 4 years prior to admission and had been followed regularly by his physicians. His resting heart rate at his last office visit B6 months before was 58/min and his hypertensive regimen, consisting of lisinopril...

Ablation of Inappropriate Sinus Tachycardia

RESULTS A total of 153 patients were included. Their mean age was 35.18 10.02 years, and 139 (90.8%) were female. All patients had failed to respond to maximum tolerated doses of pharmacological therapy (3.5 2.4 drugs). Mean baseline heart rates averaged 101.3 16.4 beats/min according to electrocardiography and 104.5 13.5 beats/min according to 24-h Holter monitoring. Two electrophysiological s...

Postural Tachycardia Syndrome and Inappropriate Sinus Tachycardia: Role of Autonomic Modulation and Sinus Node Automaticity

BACKGROUND Inappropriate sinus tachycardia (IST) and postural tachycardia syndrome (POTS) are 2 disorders characterized by sinus tachycardia. It is debated whether the pathophysiology of IST and POTS results from abnormal autonomic regulation or abnormal sinus node function. We hypothesized that intrinsic heart rate (IHR) after autonomic blockade would be increased in patients with IST but not ...

Children—Not Simply “Little Adults”