ST elevation
Fig. 13.2 Why posterior wall infarction results in anterior lead ST depression. No lead looks directly at the posterior wall of the heart. Leads extended further round the chest (e.g….
QRS axis deviation
Fig. 10.2 Mechanism of axis deviation in partial left bundle damage. (a) Normal: current passes down the specialized conducting tissue, with the left ventricle dominating the axis, as this is…
Increased QRS amplitude
Fig. 8.2; Table 1 The ECG signs of right ventricular hypertrophy (RVH). The impact of RVH is on the QRS axis (which shifts to the right (a) and the right-sided…
Q waves and loss of R wave height
Fig. 9.2 ECGs showing Q waves. (a) Anterior wall myocardial infarct; sinus rhythm, P wave is unremarkable. Pathological Q waves in leads V1–3, really quite deep, with biphasic T waves,…
The normal P wave
Fig. 4.2 (a) Timing and size of the contribution of right and left atria to the shape of the P wave. Right atrial depolarization occurs first, and occupies the first…
