I n the electrocardiogram of this 69-year-old man (Figure), the rhythm strip of lead II best demonstrates the cardiac rhythm. Th ere is sinus rhythm at a rate of 65 beats/min. Th e 1st, 5th, 9th, and 13th QRSs are capture complexes. Capture complexes are separated from one another by three wide (0.13s) QRSs that occur regularly at a rate of 86 beats/min; this is an accelerated (rate 60–110 beat...

ventricular arrhythmias are one of the most important causes of annual deaths in the world, which may lead to sudden cardiac deaths. accurate and early diagnosis of ventricular arrhythmias in heart diseases is essential for preventing mortality in cardiac patients. ventricular activity on the electrocardiogram (ecg) signal is in the interval from the beginning of qrs complex to t wave end. vari...

SINUS bradyeardia has been associated with a number of entities, both normal and pathologic; however, it is usually of a transient nature. It has been found in 30 per cent of healthy young males,' the well-trained athlete,2 and has been associated with pregnancy, particularly the post partum period.3 Its incidence markedly exceeds what might be expected in starvation, myxedema, jaundice, increa...

The ECG showed normal sinus rhythm at 65 per min., with a very short P-R interval (0.10 sec.). On the fourth beat of the first lead set (simultaneous leads I, II, III), which is marked with an arrow, there is an atrial premature, contraction. This latter beat has a low, rather flat P wave preceding the QRS with a P-R interval of 0.20 sec. The contrast between the sinus beats (with short PR) and...

Two cases of sinus rhythm with ventricular extrasystoles are reported in which extrasystoles arising from the same focus obey the rule of "comcealed bigeminy" and the "rule of bigeminy". In a comparatively rapid sinus rhythm, shortening of the sinus cycle favors the appearance of extrasystoles, and the extrasystoles obey the fule of "concealed bigeminy"; namely, sinus impulses intervene between...

We present a unique and rare case of young female patient who presented with complaints typical her prior panic attacks was found to have junctional escape rhythm on ECG. Upon resolution symptoms, repeat ECG demonstrated return normal sinus rhythm. Given that alternative etiologies had been ruled out, it postulated attack induced transient

Sinus bradycardia can be defined as a sinus rhythm with a resting heart rate of 60 beats per minute or less. While it is assumed that increased autonomic parasympathetic activity is associated with sinus bradycardia, such an association has yet to be proven. The aims of this study were to compute a number of heart rate variability (HRV) parameters in healthy individuals with sinus bradycardia a...

conclusions echocardiography and 2d speckle tracking strain imaging shows improvements in left ventricular deformation indices in atrioventricular reentrant tachycardia (avrt) and atrioventricular nodal reentrant tachycardia (avnrt) patients for the mean systolic strain and strain rate at 24 hours and the three-month follow-up. in spite of the normal lvef, even during sinus rhythm, deformation ...