Medically reviewed by Richard N. Fogoros, MD Ventricular tachycardia (V-tach or VT) is when the lower chamber of the heart ...

Sinus arrhythmia refers to a changing sinus node rate with the respiratory cycle, on inspiration and expiration. This is quite common in young, healthy individuals and has no clinical significance.

Sinus node dysfunction (SND) comprises a variety of abnormalities consisting of sinus arrest, sinus bradycardia, sinoatrial block, and alternating episodes of tachycardia and bradycardia.

This indicates that the pacemaker is coming from the sinus node and not elsewhere in the atria, with an atrial rate of greater than 100 beats per minute. The ventricular rate (indicated by the QRS ...

Mild or compensated heart failure. Ischemic heart or peripheral vascular disease. 1 st-degree AV block. Sinus node dysfunction. Conduction disorders (eg, Wolff-Parkinson-White). Monitor HR during ...

Increased heart rate is associated with increased cardiovascular risk in the general population, and in those with coronary artery disease ... by acting on the sinus node, and can be used with ...