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The prevalence, incidence and prognostic value of the Brugada-type electrocardiogram

A population-based study of four decades

Kiyotaka Matsuo, MD^* , Masazumi Akahoshi, MD, Eiji Nakashima, PhD, Akihiko Suyama, MD, Shinji Seto, MD^*, Motonobu Hayano, MD^* and Katsusuke Yano, MD^*

^* Third Department of Internal Medicine, Nagasaki University School of Medicine, Nagasaki, Japan
Radiation Effects Research Foundation, Nagasaki, Japan
Radiation Effects Research Foundation, Hiroshima, Japan

View larger version (144K): [in a new window]   Figure 1 Twelve-lead electrocardiogram of a typical pattern of the Brugada type. A terminal R' wave in lead V1, a convex curve or "coved"-type ST segment elevation in leads V1 (0.3 mV) and V2 (0.4 mV) and "saddle-shaped"-type ST segment elevation in lead V3 (0.2 mV) can be seen during sinus rhythm.

View larger version (40K): [in a new window]   Figure 2 Standard electrocardiogram (ECG) leads V1 to V3 of a typical intermittent course taken from a subject with a Brugada-type ECG. From 1965, we observed the Brugada-type ECG with "coved"-type ST segment elevation in lead V1 and "saddle-shaped"-type ST segment elevation in leads V2 and V3. Transient normalization was observed in 1977, but the ECG reverted to the Brugada type in 1979. Maximal ST segment elevation in leads V1 to V3 developed in 1981.