Archives

A PR interval shorter than normal (less than 0.12 seconds) occurs commonly with junctional rhythms (the impulse begins somewhere in the AV junction) because part Read More

More common with the elderly, the matrix of fibrous tissue around the SA node becomes denser, eventually affecting the ability of the SA node to Read More

Located in the upper right atrium near the inlet for the superior vena cava, serves as the predominant pacemaker for the heart with rates usually Read More

A cardiac rhythm that originates from the SA node without the usual regular rhythm indicative of sinus rhythm; this rhythm is common for children and Read More

A cardiac rhythm that originates from the SA node with a rate less than 60/minute. 1. Six Second ECG Guidebook (2012), T Barill, p. 104, Read More

The sinus node is protected by a loose matrix of connective tissue. In advanced age, this loose matrix can become denser. A possible result of Read More

Prolonged pauses in electrical activity – no P waves or QRS complexes – points to trouble at or near the sinus node. The return of Read More

A cardiac rhythm that originates from the SA node with rate of 60-100/minute. Normal Sinus Rhythm: also known as regular sinus rhythm or sinus rhythm, Read More

A cardiac rhythm that originates from the SA node with rates most often 101-180/minute. 1. Six Second ECG Guidebook (2012), T Barill, p. 104, 206 Read More

Perhaps the simplest and most common method to determine heart rates involves multiplying the number of QRS complexes found over six seconds by a factor Read More