Sinus bradycardia occurs on an ECG when there is a normal upright ... Severe sinus bradycardia is a form of sick sinus syndrome, and a pacemaker would relieve any associated symptoms.

The ECG criteria to diagnose sinus arrhythmia ... person and not occurring with respiration may be a sign of ― sick sinus syndrome, or SSS.

We examined the effects of cilostazol, a quinolone derivative, on HR and HR variability in patients with sick sinus syndrome. Design: Non-blind sequential single-group study. Patients: 12 patients ...