Enlarge Source: Learn the Heart Which of the following does the above ECG represent? The ECG shows sinus tachycardia at about 110 beats per minute with a prolonged PR of 0.22 seconds: first-degree ...

This ECG demonstrates an "extensive anterior" and "tombstoning" of the ST segment seen during a large acute anterior myocardial infarction. This is usually the result of thrombosis of the left ...

From the above discussion, it is clear that fusion may be sometimes difficult to recognize in the surface electrocardiogram, so it would be useful if the intracardiac recordings can help. Henthorn et ...

Background: The availability of stored intracardiac electrograms from implantable defibrillators (ICDs) has facilitated the study of the mechanisms of ventricular tachyarrhythmia onset. This study ...