Beta-Blocker Therapy Induces Ventricular Resynchronization in Dilated Cardiomyopathy With Narrow QRS Complex
Yasuhiko Takemoto, MD, PhD*,*,
Takeshi Hozumi, MD, PhD, FACC*,
Kenichi Sugioka, MD, PhD*,
Yasuhiro Takagi, MD, PhD*,
Yoshiki Matsumura, MD, PhD*,
Minoru Yoshiyama, MD, PhD*,
Theodore P. Abraham, MD, FACC and
Junichi Yoshikawa, MD, PhD, FACC
* Department of Internal Medicine and Cardiology, Osaka City University School of Medicine, Osaka, Japan
Division of Cardiology, John Hopkins University, Baltimore, Maryland
Department of Cardiology, Osaka Ekisaikai Hospital, Osaka, Japan
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Figure 1 Representative Traces of Myocardial Strains
(Top) Myocardial strains of the left ventricular midinferoseptal segment: left panels = baseline; middle panels = 1 month; right panels = 6 months. (Bottom) Myocardial strains of the left ventricular midlateral segment. Inferoseptal to lateral wall delay in time from electrocardiographic peak R wave to peak systolic strain was 83 ms at baseline, –2 ms at 1 month, and –3 ms at 6 months.
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