An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Jones PH, Goldberg AC, Knapp HR, Kelly MT, Setze CM, Stolzenbach JC, Sleep DJ.Jones PH, et al. Among authors: knapp hr.Am Heart J. 2010 Oct;160(4):759-66. doi: 10.1016/j.ahj.2010.06.045.Am Heart J. 2010.PMID: 20934572Clinical Trial.
Schrott HG, Knapp H, Davila M, Shurzinske L, Black D.Schrott HG, et al.Am Heart J. 2000 Aug;140(2):249-52. doi: 10.1067/mhj.2000.108245.Am Heart J. 2000.PMID: 10925339Clinical Trial.