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Indications, Contraindications, and Preparations for Exercise Stress Testing

…been discussed in Introduction to Exercise ECG. The most common indications are as follows: Assessment of cardiovascular risk in screening. Detection of coronary artery disease …

QT duration & corrected QT (QTc) duration: ECG features & implications

ECG Introduction to ECG interpretation QT duration and corrected QT (QTc) duration ECG interpretation always includes an assessment of the QT interval (QT duration). The…

Ventricular Tachycardia

Cardiology Introduction Ventricular tachycardia (VT) represents a complex and potentially lethal spectrum of cardiac arrhythmias that remains a formidable challenge in contemporary cardiovascular medicine. As…

The ST segment: physiology, normal appearance, ST depression & ST elevation

…into primary and secondary. Primary and secondary ST T changes Primary ST T changes are caused by abnormal repolarization . This is seen in ischemia, electrolyte…

Overview of the ECG Waves, Deflections, Intervals, Durations

…segment starts. The T wave The T wave reflects the rapid repolarization (recovery) of the myocardium and T wave changes occur in numerous conditions. T…

Introduction to pediatric & neonatal ECG interpretation

…foramen ovale – between the right and left atrium. Most of the blood in the right atrium flows through the foramen ovale into the left atrium…

Introduction to pediatric & neonatal ECG interpretation

…foramen ovale – between the right and left atrium. Most of the blood in the right atrium flows through the foramen ovale into the left atrium…

The electrical axis of the heart (ECG axis)

…Figure 1. The electrical axis of the heart (heart axis). As evident from the figure, the normal heart axis is between –30° and 90°. If…

The electrical axis of the heart (heart axis): ECG & physiology

…Figure 38. The electrical axis of the heart (heart axis). As evident from the figure, the normal heart axis is between –30° and 90°. If…

The QRS complex: ECG features of the Q-wave, R-wave, S-wave & duration

…Introduction to ECG interpretation The QRS complex (ventricular complex): normal and abnormal configurations and intervals A complete QRS complex consists of a Q , R and…

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