Background Previous epidemiological studies demonstrated that premature atrial contractions (PACs) and premature ventricular ...

Wide QRS regular tachycardia is present in Figure 1. No definite P waves are identifiable. There is one PVC in the lower tracing. During the compensatory pause, there is definitely a P wave (↓ on ...

Background and objective Prior studies have suggested that patients with premature ventricular complexes (PVCs) may have an ...

Right ventricular hypertrophy occurs when the right ventricular wall thickens due to chronic pressure overload, similar to that of left ventricular hypertrophy. RVH is diagnosed on ECG in the presence ...

A left ventricular aneurysm can be diagnosed on ECG when there is persistent ST segment elevation occurring 6 weeks after a known transmural myocardial infarction (usually an anterior MI). Without ...

In tracing "a" of Figure 1, there seems to be only one P wave in front of each QRS complex, suggesting sinus rhythm. However, during the compensatory pauses after the PVCs (↑) in tracing "b," there ...