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.
ECG at rest and ECG during maximum dry apnea in two subjects. (A) Sinus rhythm at rest (top) and nodal rhythm during maximum dry apnea (bottom). Recorded at 25 mm/s. Continues on next page. (B) Sinus rhythm at rest (top) and second-degree atrioventricular dissociation during maximum dry apnea (bottom). Recorded at 25 mm/s.
