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.
M-mode echocardiographic tracings from an Npr1 +/+ and an Npr1 −/− mouse. ECG, electrocardiogram; IVS, interventricular septal wall; PW, posterior wall. The longer and shorter vertical bars illustrate the left ventricular end diastolic and end systolic dimensions, respectively. The ECG is used for timing purposes and, because it is not calibrated, cannot be used to assess conduction patterns.
