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…
Strengths and weaknesses of the ECG
Fig. 2.2 The reliability of the ECG in diagnosis and management. The ECG is a powerful tool, useful diagnostically and therapeutically in suspected cardiac disease, in non-cardiac problems, e.g. non-accidental…
