the presence of repolarization alternans (T-wave alternans), which is variation in the vector and amplitude of the T wave component of the EKG. The amount...

beat-to-beat variation in the amplitude or shape of the T wave may be termed T wave alternans. The refractory period of cardiac muscle is distinct from...

Alternans". StatPearls Publishing. PMID 30480962. Retrieved December 29, 2023. M, Goyal; KM, Woods; JE, Atwood (August 2013). "Electrical alternans:...

(represented by the latter half of the T-wave). An R-on-T can initiate torsades. Sometimes, pathologic T-U waves may be seen in the ECG before the initiation...

A J wave — also known as Osborn wave, camel-hump sign, late delta wave, hathook junction, hypothermic wave, K wave, H wave or current of injury — is an...

QRS complex is positive (height of R wave > S wave), equiphasic (R wave = S wave), or negative (R wave < S wave). If lead I is positive and lead aVF is...

(termination of QRS complex and the beginning of ST segment) and ends with the T wave. The ST segment is the plateau phase, in which the majority of the myocardial...

"slurred" S wave). The T wave should be deflected opposite the terminal deflection of the QRS complex. This is known as appropriate T wave discordance...

reset. Since the sinus P wave to PVC interval is less than the normal P–P interval, the interval between the PVC and the next P wave is prolonged to equal...

manifest with Q-waves in the inferior leads II, III, and aVF. By contrast, QRS complexes in the inferior leads should begin with r-waves in LAFB.[citation...