Usefulness of body surface mapping to differentiate patients with Brugada syndrome from patients with asymptomatic Brugada syndrome.
We attempted to determine the usefulness of body surface mapping (BSM) for differentiating patients with Brugada syndrome (BS) from patients with asymptomatic Brugada syndrome (ABS). Electrocardiograms (ECG) and BSM were recorded in 7 patients with BS and 35 patients with ABS. Following the administration of Ic antiarrhythmic drugs, BSM was recorded in 5 patients with BS and 16 patients with ABS. The maximum amplitudes at J0, J20, J40 and J60 were compared between the 2 groups, as were 3-dimensional maps. The maximum amplitudes at J0, J20 and J60 under control conditions were larger in patients with BS than in patients with ABS (P < 0.05). A three-dimensional map of the ST segments under control conditions in patients with BS showed a higher peak of ST elevation in the median precordium compared to that for patients with ABS. Increases in ST elevation at J20, J40 and J60 following drug administration were greater in patients with BS than in patients with ABS (P < 0.05). Evaluation of the change in amplitude of the ST segment at E5 caused by Ic drug administration was also useful for differentiating between the 2 groups. In conclusion, BSM was useful for differentiating patients with BS from those with ABS.
Hisamatsu
Kenichi
K
Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine and Dentistry, Okayama 700-8558, Japan. kenichi@cc.okayama-u.ac.jp
Kusano
Kengo Fukushima
KF
Morita
Hiroshi
H
Takenaka
Shiho
S
Nagase
Satoshi
S
Nakamura
Kazufumi
K
Emori
Tetsuro
T
Matsubara
Hiromi
H
Ohe
Tohru
T
D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D018780:Body Surface Potential Mapping; D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D016757:Death, Sudden, Cardiac / Q000209:etiology; D004562:Electrocardiography; D006801:Humans; D008875:Middle Aged; D013577:Syndrome; D014693:Ventricular Fibrillation / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology
D000889:Anti-Arrhythmia Agents