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Digitized QT dispersion by the Valsalva Maneuver in Hypertensive Patients

Yoon, Hee-Jeoung    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Jin, Seung-Won    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Lee, Jong-Min    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Shin, Woo-Seung    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Oh, Yong-Suk    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Lee, Man-Young    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Seung, Ki-Bae    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.   ); Rho, Tai-Ho    (Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea College of Medicine,  ); Kim, Jae-Hyung   Hong, Soon-Jo   Choi, Kyu-Bo  
  • 초록

    Background Hypertension is an important risk factor for sudden cardiac death, of which the incidence increases with increases in blood pressure. Prolonged QT dispersion has been identified to indicate increased risk of life-threatening ventricular arrhythmia and sudden cardiac death. In this study, QT dispersion was investigated in hypertensive patients during the strain phase of the Valsalva maneuver. Methods The study population included 75 subjects: 25 with normal blood pressure (Control), 25 with stage I hypertension (Group A), and 25 with stage II hypertension (Group B). Electrocardiography for QT dispersion was recorded at 25 mm/sec paper speeds before and during the Valsalva maneuver. Results The patients in Group B were significantly older than the controls ( p p p Conclusion The conditions that increase intrathoracic pressure may increase QT dispersion and severe hypertensive patients should avoid these conditions.


  • 주제어

    Valsalva maneuver .   Hypertension.  

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