Narrow and broad/Wide QRS complex morphology Low/high voltage QRS, differential diagnosis, causes and spot diagnosis on LITFL ECG library
The J point is the the junction between the termination of the QRS complex and the beginning of the ST segment. EKG J-point
QT interval is the time from the start of the Q wave to the end of the T wave, time taken for ventricular depolarisation and repolarisation
ECG PR segment is the flat, usually isoelectric segment between end of the P wave and the start of the QRS complex.
Assessment / interpretation of the EKG PR interval. ECG PR interval is the time from the onset of the P wave to the start of the QRS complex.
The characteristic ECG findings in the Wolff-Parkinson-White syndrome include a slurred upstroke to the QRS complex (the Delta wave)
The U wave is a small (0.5 mm) deflection immediately following the T wave, usually in the same direction as the T wave. Best seen leads V2 and V3.
T wave abnormalities include Peaked T waves, Hyperacute T waves, Inverted T waves, Biphasic T waves, ‘Camel Hump’ T waves, Flattened T waves