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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Stroke. 2014 Jul 22;45(9):2786–2788. doi: 10.1161/STROKEAHA.114.006364

Figure 1.

Figure 1

A. Illustration of components of P-wave terminal force (PTFV1), defined as the duration (ms) of the downward deflection (shaded grey area) of the P-wave in lead V1 multiplied by the absolute value of its amplitude (μV).7

B. Representative examples of ECGs with normal and abnormal P-wave terminal force in lead V1 (PTFV1). Note the deep downward deflection of the terminal portion of the P-wave in the ECG on the right, compared with the absence of a deep downward deflection in the normal ECG on the left.