Conclusion: ECG systems, comprising 2 or 6 leads, can be substituted for the 12-lead ECG for certain clinical and research applications (pertaining to the amplitude of QRS complexes), attesting to ...

1). What is the mechanism for the progressive widening of QRS complexes and for the normal narrow QRS complexes observed in the 13 and 18 atrial-paced beats? The occurrence of overdrive atrial ...

It is notable that the ECG obtained at presentation showed the presumed sinus rhythm with first-degree atrioventricular block (PR interval, 230 milliseconds), along with right bundle-branch block and ...

This is a type of narrow complex tachycardia, with a narrow QRS in the ECG. Ventricle pacemaker cells have a normal rate ...