The P-wave, PR interval and PR segment ECG interpretation traditionally starts with an assessment of the P-wave. The P-wave reflects atrial depolarization (activation). The PR interval is the distance between the onset of the P-wave to the onset of the QRS complex. The PR interval is asse...
The J point on the normal ECG indicates the junction between the QRS complex and the ST segment and, thereby, the end of activation of the ventricles on the ECG. From: Journal of Electrocardiology, 2013 About this pageSet alert Discover other topics On this page Definition Chapters and Articl...
frontal plane QRS axisheart vectorneutral planenormal ECGpositive hemisphereprecordial planeSummary The neutral plane divides the space around the heart into two halves. The half along the positive side of the lead axis is the positive hemisphere. Any resultant heart vector in that hemisphere has a...
normal QRS axis normal P waves height < 2.5 mm in lead II width < 0.11 s in lead II for abnormal P waves see right atrial hypertrophy, left atrial hypertrophy, atrial premature beat, hyperkalaemia normal PR interval 0.12 to 0.20 s (3 - 5 small squares) for short PR segment...
PR interval(measured from the beginning of the P wave to the first deflection of the QRS complex). Normal range 120 – 200 ms (3 – 5 small squares on ECG paper). QRS duration(measured from first deflection of QRS complex to end of QRS comple...
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Describe the electrical events occurring in the heart that are responsible for the P wave, QRS complex and T waves of the ECG. What is happening to the myocardium during (1) the PR interval and (2) the ST segment? Summarize the ECG characteristics of the premature ventricular complex given...
Normal ECG NT-proBNP: N-terminal fragment of proBNP PAC: Premature atrial contraction PACED: Paced rhythm PAUSE: Sinus pause PCI: Percutaneous coronary intervention PJC: Premature junctional contraction PR: PR Interval abnormality PSC: Premature supraventricular contraction ...
The QRS interval can be modified by several factors (such as bundle branch block, Class 1c antiarrhythmic drugs, or preexcitation); these changes in depolarization can alter re- polarization in unexpected ways, and thus the QT interval may not be an accurate reflection of repolarization du...
In normal sinus rhythm, what does the P-wave, the PR interval, QRS complex, and QT interval reflect?ECG:An ECG, or electrocardiogram, is an electrical readout of the heart which measures the electrical output of all heart chambers during cardiac cycles. Th...