Comparison of the Prevalence of First-Degree: RESULTS

Figure and Table 1 demonstrate the gradual rising prevalence of first-degree AV block with advancing age in both ethnic groups. In the study group (Table 1), 6.9% (n=64 of 922) African-American patients had first-degree AV block, compared with 7.0% (n=84 of 1,201) Caucasian patients. For African-American patients, there is a gradual rise in the prevalence of first-degree AV block beginning at age 50 years and peaking in the 10th decade of life at 23.3% (n=10 of 43) patients. For Caucasian patients there is a gradual rise in the prevalence of first-degree AV block beginning at age 50 years with peaking in the ninth decade of life at 14.6% (n=26 of 178) patients, followed by a decline in the 10th decade of life to 12.2% (n=22 of 181) patients. First-degree AV block is more prevalent in African-American patients compared with Caucasian patients in all age groups of the study except for those patients in the eighth decade of life.

Table 1. Prevalence of First-Degree Atrioventricular Block by Age and Race in an Urban Hospital

Age Groups (Years)

20-2?

30-39

4(M9

50-59

60-69

70-79

80-89

90-99    Totals

Number of patients in age group

223

217

296

296

284

295

288

224      2123

Race: Caucasian/ African-American

117/106

104/113

129/167

153/143

167/117

172/123

178/110

181/43 1,201/922
Number of patients with first-degree atrioventricular block

1/3

1/4

1/4

7/10

12/10

14/6

26/17

22/10    84/64

Percent

0.9/2.8

1.0/3.5

0.8/2.4

4.6/7.0

7.2/8.5

8.1/4.9

14.6/15.5

12.2/23.3 7.0/6.9

Gender and Racial Prevalences of First-Degree AV Block

First-degree AV block occurred in 7.6% (n=72 of 950) male patients in the study, in 7.1% (n=27 of 380) African-American male patients, and in 7.9% (n=45 of 570) Caucasian male patients. First-degree AV block occurred in 6.5% (n=76 of 1,173) female patients in the study group, in 6.8% (n=37 of 542) African-American female patients; and in 6.2% (n=39 of 631) Caucasian female patients. cialis professional

The Placement of Electronic Pacemakers

In the study group, 47 patients received electronic pacemakers. For African Americans 1.3% (n=12 of 922) patients received electronic pacemakers. Placement of the pacemakers occurred primarily between ages 80-89 years when six of the 12 pacemakers were placed. For Caucasians, 2.9% (n=35 of 1,201) patients received electronic pacemakers. Placement occurred primarily between ages 80-99 years when 27 of the 35 pacemakers were placed.

Figure 1. Prevalence of Atrioventricular Block by Age and Race

Figure 1. Prevalence of Atrioventricular Block by Age and Race
The prevalence of first-degree AV block at various ages in African-American and Caucasian patients. The prevalence of first-degree AV block in African-American patients gradually increases from age 50 through 99 years to a level of 23.3% in the 10th decade of life. For Caucasian patients, the prevalence of first-degree AV block gradually increases from age 50 through 89 years to a level of 14.6% in the ninth decade of life, followed by a decline to 12.2% in the 10th decade of life. First-degree AV block is more prevalent in African-American compared with Caucasian patients at all age groups except in the eighth decade of life. suhagra 100

Category: Main

Tags: AV block, AV conduction, electrocardiograms, pacemakers

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