1 ATRIAL FIBRILLATION AT BASELINE AND DURING FOLLOW-UP in The Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial November 9, 2003 ALLHAT L. Julian Haywood, Charles E. Ford, Richard S. Crow, Barry R. Davis, Paula T. Einhorn, Angela Williard, and Barry Massie
2Purpose To document the prevalence of atrial fibrillation (AF) or atrial flutter (AFL) at baseline and its new appearance during follow-up in ALLHAT.To document the prevalence of atrial fibrillation (AF) or atrial flutter (AFL) at baseline and its new appearance during follow-up in ALLHAT. To determine the influence of AF/AFL at baseline on outcome in ALLHAT.To determine the influence of AF/AFL at baseline on outcome in ALLHAT. ALLHAT
3ALLHAT Background Randomized, double-blind, multicenter trialRandomized, double-blind, multicenter trial Determined whether fatal CHD or nonfatal MI was lower for high-risk hypertensives treated with amlodipine (CCB), lisinopril (ACEI), doxazosin (alpha blocker) vs chlorthalidone (diuretic)Determined whether fatal CHD or nonfatal MI was lower for high-risk hypertensives treated with amlodipine (CCB), lisinopril (ACEI), doxazosin (alpha blocker) vs chlorthalidone (diuretic) Atrial fibrillation (AF) is the most common serious arrhythmia affecting morbidity and mortality.Atrial fibrillation (AF) is the most common serious arrhythmia affecting morbidity and mortality.
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5ALLHAT Methods Standard 12-lead ECGs, recorded at baseline and at 2-year intervals during follow-up, were coded for Q-wave abnormalities, ST-segment depression, T-wave inversion, LVH, bundle branch block, and atrial fibrillation or flutter, using the Minnesota Code.Standard 12-lead ECGs, recorded at baseline and at 2-year intervals during follow-up, were coded for Q-wave abnormalities, ST-segment depression, T-wave inversion, LVH, bundle branch block, and atrial fibrillation or flutter, using the Minnesota Code. Univariate and multivariate statistical methods were used to determine prevalence, incidence, and prognosis as relates to multiple clinical parameters, and according to treatment group.Univariate and multivariate statistical methods were used to determine prevalence, incidence, and prognosis as relates to multiple clinical parameters, and according to treatment group.
6ALLHAT ChlorthalidoneAmlodipineLisinoprilDoxazosinTotal Sample Size15,2559,0489,0549,06142,418 No ECGs597(3.9)311(3.4)350(3.9)369(4.1)1,627 No Baseline ECG a 596(3.9)409(4.5)390(4.3)340(3.8)1,735 Atrial Fibrillation 138(0.9)97(1.1)83(0.9)85(0.9)403 Atrial Flutter9(0.06)2(0.02)5(0.06)4(0.04)20 No AF or AFL13,915(91.2)8,229(90.9)8,226(90.9)8,263 (91.2)38,633 Total with Baseline ECG b 14,062(92.2)8,328(92.0)8,314(91.8)8,352 (92.2)39,056 Sample Size and Number (%) of Participants with AF a.Missing a baseline ECG, but with one or more follow-up ECGs on file. b.Sample size less those with no ECGs and no baseline ECG.
7ALLHAT ChlorthalidoneAmlodipineLisinoprilDoxazosin aTotal Sample Size15,2559,0489,0549,06133,357 No ECGs597(3.9)311(3.4)350(3.9)369(4.1)1,258 No Baseline ECG b 596(3.9)409(4.5)390(4.3)340(3.8)1,395 AF c 147(0.9)99(1.1)88(0.9)89(0.9)334 No AF or AFL13,915(91.2)8,229(90.9)8,226(90.9)8,263 (91.2)30,370 Total with Baseline ECG 14,062(92.2)8,328(92.0)8,314(91.8)8,352 (92.2)30,704 Sample Size and Number (%) of Participants with AF, Excluding Doxazosin Group a.The doxazosin arm of ALLHAT was stopped in January 2000 due to higher CV events and virtually no chance to show a difference in CHD. b.Missing baseline ECG but one or more follow-up ECGs on file. c.Atrial fibrillation and flutter, combined.
8AFPresentAFAbsent N33430,370 Mean age, y * Age 70+, % ** Black, % * Women, % ** Mean SBP Mean DBP Type 2 diabetes, % * History of CHD, % ** ECG LVH, % Cigarette Smokers, % ** Baseline Characteristics Stratified By Atrial Fibrillation Status * Indicates statistical significance of difference (p < 0.05). ** Indicates statistical significance of difference (p < 0.01). ALLHAT
9AFPresentAFAbsent N33430,370 On BP Medication, % With ASCVD, % ** Serum Creatinine >= 1.5, % Month Potassium < 3.5, % Mean Serum Glucose, mg/dL Mean Cholesterol, mg/dL ** Mean LDL-C, mg/dL ** Mean HDL-C, mg/dL ** Mean Triglycerides, mg/dL Mean BMI, kg/m Baseline Characteristics Stratified By Atrial Fibrillation Status * Indicates statistical significance of difference (p < 0.05). ** Indicates statistical significance of difference (p < 0.01). ALLHAT
10ALLHAT Prevalence of Atrial Fibrillation Per 1000 Participants, by Randomized Treatment Group * Compared with chlorthalidone, neither the amlodipine nor lisinopril group differed significantly. Events per 1000 AF prevalence was 10.9 per 1000, overall (334/30,704).
11ALLHAT Prevalence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics * Subgroup differs significantly from comparison group (55-69, women, black) before and after adjusting for age, race, and sex (p < 0.01). Age at Entry, years Events per 1000
12ALLHAT Prevalence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics * ASCVD subgroup differs significantly from comparison group (no ASCVD) before and after adjusting for age, race, and sex (p < 0.01). Events per 1000
13ALLHAT Prevalence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics Subgroups do not differ significantly from comparison groups after adjustment for age, race, and sex differences. Events per 1000
14ALLHAT Occurrence of New Atrial Fibrillation Chlorthalidone n % n %Amlodipine Lisinopril Total Unknown , Negative 14, , , , AF Flutter Total 15, , , ,357--
15ALLHAT Occurrence of Atrial Fibrillation Per 1000 Participants, by Randomized Treatment Group * Compared with chlorthalidone, neither the amlodipine nor lisinopril group differed significantly. RR (95% CI) p value A/C1.07 ( )0.53 L/C0.95 ( )0.64 Events per 1000 AF incidence was 17.2 per 1000, overall (551/32,042).
16ALLHAT Occurrence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics Adj. RR (95% CI) p value M/W2.10 ( )< NB/B2.00 ( )< / ( )< / ( )< Events per 1000 Age, years
17ALLHAT Occurrence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics Adj. RR (95% CI) p value CHD1.48 ( )< ASCVD1.42 ( )< LVH2.01 ( )< Events per 1000 Left Ventricular Hypertrophy by ECG.
18ALLHAT Occurrence of Atrial Fibrillation Per 1000 Participants, by Baseline Characteristics Adj. RR (95% CI) p value Smoker0.76 ( ) 0.03 BMI> ( )< K+ < ( )< Events per 1000 Serum potassium at 3-month visit.BMI = Body Mass Index
19ALLHAT Cumulative Event Rate Years to Death AF Absent AF Present Cumulative Event Rates for All-Cause Mortality by Entry AF Status RR (95% CI) p value AF/Not 2.86 ( ) < AF No AF 30,37029,76429,06328,165 25,126 25,126 14,851 14,8517,439
20ALLHAT Cumulative Event Rate Years to Fatal CHD or Nonfatal MI Cumulative Event Rates for Fatal CHD or Nonfatal MI, by Entry AF Status AF Present AF Absent RR (95% CI) p value AF/Not 1.61 ( ) < 0.01 AF No AF 30,37028,85227,57626,248 22,939 22,939 13,250 13,2506,502
21ALLHAT Cumulative Event Rate Years to Stroke Cumulative Event Rates for Stroke by Entry AF Status AF Present AF Absent RR (95% CI) p value AF/Not 3.61 ( ) < AF No AF 30,37028,95927,82926,646 23,433 23,433 13,628 13,6286,795
22ALLHAT Cumulative Event Rate Years to Death Chlorthalidone Amlodipine Lisinopril Cumulative Event Rates for All-Cause Mortality in Those with AF at Entry, by Treatment Group RR (95% CI) p value A/C 0.75 ( L/C 0.71 ( ) 0.14 C: A: L:
23ALLHAT Cumulative Event Rates for Fatal CHD or Nonfatal MI in Those with AF, by Treatment Group Cumulative Event Rate Years to Fatal CHD or Nonfatal MI Chlorthalidone Amlodipine Lisinopril RR (95% CI) p value A/C 0.62 ( L/C 0.81 ( ) 0.58 C: A: L:
24ALLHAT Cumulative Event Rate Years to Stroke Cumulative Event Rates for Stroke by Treatment Group In Participants with AF at Baseline Chlorthalidone Amlodipine Lisinopril RR (95% CI) p value A/C 1.53 ( L/C 1.10 ( ) 0.79 C: A: L:
25Conclusion-1 1.Prevalence of AF in ALLHAT at baseline was increased by: age, non-Black status, male gender, and presence of ASCVD. 2.AF at baseline was associated during follow-up with: increased overall mortality increased fatal CHD and MI increased stroke ALLHAT In high-risk hypertensive patients :
26Conclusion-2 3.Likelihood of new onset of AF during follow-up was increased by: Age, male gender, non-Black race, CHD, ASCVD, LVH 4.Randomization to chlorthalidone, amlodipine and lisinopril did not influence prevalence of AF at baseline or its new appearance during follow-up. 5.Among participants with AF/AFL at baseline, there were no differences among randomized groups for mortality, major CHD events, or stroke. ALLHAT
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