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Pericarditis is classically associated with ECG changes that evolve through four stages. Generalised T wave flattening 1 to 3 weeks.

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Endo-to-epicardial depolarization of the inferior wall rS pattern in the inferior leads qR pattern in the lateral leads Depolarization in an up-and-left direction Left-axis deviation Depolarization reaches left side of heart more slowly Prolonged R-wave peak time in aVL Left Posterior Inferior Fascicular Block.

. Different from baseline ECG or changing. The electrical axis of the heart is the net direction in which the wave of depolarization travels. Stages of Pericarditis.

Left ventricular hypertrophy digoxin effect dynamic ST segment and T wave changes ie. Stage 2 normalisation of ST changes. Patterns of Myocardial Ischaemia Two main ECG patterns associated with NSTEACS.

T wave flattening or inversion. Stage 1 widespread STE and PR depression with reciprocal changes in aVR occurs during the first two weeks. It is measured using an electrocardiogram ECGNormally this begins at the sinoatrial node SA node.

The hexaxial reference system can be used to visualise the directions in which the depolarisation wave may. The physiology of the LPIF block is similar to that. While there are numerous conditions that may simulate myocardial ischaemia eg.

From here the wave of depolarisation travels down to the apex of the heart. Stage 3 flattened T waves become inverted 3 to several weeks.

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