Abstract:
:Ejection fraction was measured directly by a radionuclide method, and indirectly from systolic time intervals, in elderly patients in atrial fibrillation. Both methods show that the ejection fraction averages approximately 55% at mean ventricular rates of 50-70 beats/min and falls to 20% or below as mean rate increases to over 120 beats/min. Atrial fibrillation is thus associated with a decrease in left ventricular performance, which is accentuated by increasing ventricular rates.
journal_name
Age Ageingjournal_title
Age and ageingauthors
Caird FI,Williams BOdoi
10.1093/ageing/10.4.231subject
Has Abstractpub_date
1981-11-01 00:00:00pages
231-6issue
4eissn
0002-0729issn
1468-2834journal_volume
10pub_type
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