: Duration should ideally be less than

: Look for elevation or depression that might indicate ischemia or injury. Specialized Learning Materials

: A simplified approach available on SlideShare that covers over 98% of common clinical cases using fundamental principles of wave morphology.

: A practical guide from ECGclic focusing on the "300, 150, 100" method for calculating heart rate and identifying sinus rhythms.

This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes. Learn more Basic ECG interpretation

: A technical PDF excerpt that details the electrical signals of the heart, action potentials, and how influx is translated into positive or negative deflections on the tracing.

: Divide 300 by the number of large squares between R-waves for regular rhythms.

: Confirm if the rhythm is sinus (a P-wave precedes every QRS complex) and regular. Analyze P-Waves : Look for a duration of seconds and a height of Evaluate Intervals : The PR interval should be fixed between small squares).