Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Measurement of P-prime amplitude (PPaV1) and P-prime duration (PPdV1) in V1 on a median beat. A. 12-lead ECG; B. Lead V1 PQRST waveform with marked P onset and offset; C. P-wave in V1 with marked PPaV1 and PPdV1. PPaV1 = −58 µV; PPdV1 = 88 ms.
