Diagnostic and prognostic value of a type 1 Brugada electrocardiogram at higher (third or second) V1 to V2 recording in men with Brugada syndrome.
To evaluate the diagnostic and prognostic value of an electrocardiogram (ECG) recorded at a higher (third or second) intercostal space, 98 men (17 to 76 years of age, mean +/- SD 47 +/- 13; with documented ventricular fibrillation [VF] in 22 and syncope in 32) were categorized into 3 groups; 68 men had a spontaneous type 1 ECG in standard leads V(1) and V(2) (S group), 19 had a spontaneous type 1 ECG only in the higher V(1) and V(2) leads (H group), and 11 had a type 1 ECG only after receiving class Ic sodium channel blockers (Ic group). There were no significant differences in baseline clinical characteristics, including VF episodes, syncope, atrial fibrillation, family history, late potentials, and inducibility of VF during electrophysiologic study across the 3 groups. During prospective follow-up periods (779 +/- 525, 442 +/- 282, and 573 +/- 382 days, respectively), subsequent cardiac events occurred in 11 men (16%) within the S group, in 2 men (11%) in the H group, and in 0 men (0%) in the Ic group (p = NS, S vs H group). In men with previous episodes of VF, subsequent cardiac events occurred in 7 (44%) within the S group and in 2 (50%) in the H group (p = NS). In conclusion, men with a spontaneous type 1 Brugada ECG recorded only at higher leads V(1) and V(2) showed a prognosis similar to that of men with a type 1 ECG in using standard leads V(1) and V(2).
Miyamoto
Koji
K
Division of Cardiology, Department of Internal Medicine, National Cardiovascular Center, Osaka, Japan.
Yokokawa
Miki
M
Tanaka
Koji
K
Nagai
Takayuki
T
Okamura
Hideo
H
Noda
Takashi
T
Satomi
Kazuhiro
K
Suyama
Kazuhiro
K
Kurita
Takashi
T
Aihara
Naohiko
N
Kamakura
Shiro
S
Shimizu
Wataru
W
D000293:Adolescent; D000328:Adult; D000368:Aged; D053840:Brugada Syndrome / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D005500:Follow-Up Studies; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D011446:Prospective Studies; D016019:Survival Analysis