A combination of the Q wave, R wave and S wave, the “QRS complex” represents ventricular depolarization. This term can be confusing, as not all ECG leads contain all three of these waves; yet ...

Although a narrow QRS complex is typically defined as an interval of less than 120 msec, patients with a QRS interval of 120 to 130 msec were included to provide additional data on this group ...

Changing QRS Complex Morphology Kyuhyun Wang, MD Disclosures December 17, 2007 Answer and Discussion Answer: Intermittent Wolff-Parkinson-White (WPW) syndrome Discussion ...

What is the mechanism for the progressive widening of QRS complexes and for the normal narrow QRS complexes observed in the ECG of a 52-yo male with recurrent syncope?

Did you know that certain medications can cause symptom of 'QRS complex'. Find these drugs listed on the page and be warned of similar symptoms as possible side-effects.

Because the normal ventricular conduction system (His-Purkinje) is used, the QRS complex is frequently narrow. A junctional rhythm is normally slow — less than 60 beats per minute.

It's a type of arrhythmia, meaning the heart rhythm isn't happening in the normal way. Idioventricular rhythm may be seen ...

Cardiac-resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure with a wide QRS complex. Mechanical dyssynchrony also occurs in patients with a narrow QRS ...

Did you know that certain medications can cause symptom of 'Electrocardiogram QRS complex'. Find these drugs listed on the page and be warned of similar symptoms as possible side-effects.