National patterns of use and effectiveness of angiotensin-converting enzyme inhibitors in older patients with heart failure and left ventricular systolic dysfunction.
BACKGROUND
Although ACE inhibitors are underprescribed for heart failure, factors associated with their use are not well described. Furthermore, the effectiveness of ACE inhibitors has been questioned in some populations, potentially contributing to underuse. Our objectives were to assess the correlates of ACE inhibitor use and the relationship between ACE inhibitor prescription and mortality in older patients with heart failure.


RESULTS
We studied a national sample aged > or =65 years who had survived hospitalization for heart failure between April 1998 and March 1999 or July 2000 and June 2001, restricting the analysis to patients with left ventricular systolic dysfunction and without a documented contraindication to use of ACE inhibitors (n=17 456). Factors associated with ACE inhibitor prescription at discharge and the relationship between ACE inhibitor prescription and death within 1 year were assessed with hierarchical logistic models. Secondary analyses assessed therapeutic substitution with angiotensin receptor blockers (ARBs). ACE inhibitors were prescribed to only 68% of this ideal cohort, and 76% received either an ACE inhibitor or an ARB. Patient, physician, and hospital factors were weak predictors of prescription, except for serum creatinine (RR for 133 to 221 micromol/L=0.87, 95% CI 0.85 to 0.89; RR for > or =222 micromol/L=0.53, 95% CI 0.49 to 0.57 compared with < or =132 micromol/L). ACE inhibitor prescription was associated with lower crude 1-year mortality (33.0% versus 42.1%, P<0.001), lower risk of death after adjustment (RR 0.86, 95% CI 0.82 to 0.90), and lower mortality regardless of patient gender, age, race, or serum creatinine level.


CONCLUSIONS
ACE inhibitors were widely underprescribed despite evidence of a favorable impact on survival in a broad range of patients with heart failure. These results emphasize the importance of ongoing efforts to translate clinical trial results into practice.
Masoudi
Frederick A
FA
Department of Medicine, Denver Health Medical Center, Denver, Colo 80204, USA. fred.masoudi@uchsc.edu
Rathore
Saif S
SS
Wang
Yongfei
Y
Havranek
Edward P
EP
Curtis
Jeptha P
JP
Foody
JoAnne Micale
JM
Krumholz
Harlan M
HM
D000368:Aged; D000369:Aged, 80 and over; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D015331:Cohort Studies; D015897:Comorbidity; D003404:Creatinine / Q000097:blood; D011307:Drug Prescriptions / Q000706:statistics & numerical data; D004363:Drug Utilization; D005260:Female; D006333:Heart Failure / Q000097:blood / Q000188:drug therapy* / Q000401:mortality; D006801:Humans; D008297:Male; D010351:Patient Discharge / Q000706:statistics & numerical data; D013318:Stroke Volume; D014481:United States / Q000453:epidemiology; D018487:Ventricular Dysfunction, Left / Q000097:blood / Q000188:drug therapy* / Q000401:mortality
D000806:Angiotensin-Converting Enzyme Inhibitors; D003404:Creatinine