PMID: 6109542Feb 1, 1981Paper

Effect of mitral valvular regurgitation on transthoracic impedance cardiogram

British Heart Journal
R M SchiekenR M Lauer

Abstract

Mitral valvular regurgitation consistently modified the wave form of the first derivative of the transthoracic impedance cardiogram. The transthoracic impedance cardiogram was recorded in 23 control subjects (group 1), and 23 patients with isolated mitral regurgitation (group 2). Simultaneous transthoracic impedance cardiogram, electrocardiogram, and mitral valve echocardiograms in group 1 showed that the primary diastolic wave ("O") of the transthoracic impedance cardiogram occurred synchronously with the maximal opening of the mitral valve. In group 2, the primary systolic wave (dZ/dt max) was diminished, and the "O" of the transthoracic impedance cardiogram was raised. The area under the systolic wave of the transthoracic impedance cardiogram (S) and the area under the diastolic opening of the transthoracic impedance cardiogram (D) were measured and the ratio D/(D + S) calculated. This ratio, called the mitral regurgitation fraction was (0.50 +/- 0.14) in group 2 which was higher than that found in group 1 control subjects (0.11 +/- 0.08). The mitral regurgitation fraction (15 to 77%) determined by the impedance method was closely correlated with the mitral regurgitation fraction (20 to 74%) obtained during cardiac catheteri...Continue Reading

References

Sep 1, 1978·British Heart Journal·R M SchiekenR M Lauer
Jan 1, 1976·Journal of Applied Physiology·J C DennistonR F Grover
Jan 1, 1967·Circulation·D G GreeneI L Bunnell
Apr 1, 1970·Circulation·Z LababidiR M Lauer
Jan 1, 1980·Catheterization and Cardiovascular Diagnosis·R M SchiekenH L Falsetti
Apr 1, 1963·American Heart Journal·H SANDLERC E RACKLEY
Mar 1, 1964·Acta Radiologica: Diagnosis·H ARVIDSSON, J KARNELL

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Citations

Jan 1, 1985·Medical & Biological Engineering & Computing·B C PenneyH B Wheeler
Dec 1, 1991·Journal of Advanced Nursing·L A Hodgson
Jun 14, 2008·Congestive Heart Failure·Heart Richard L SummersW Franklin Peacock
May 1, 1991·IEEE Transactions on Bio-medical Engineering·R P PattersonS B Raza
Jul 1, 1986·International Journal of Cardiology·W N HubbardD J McBrien
Jun 1, 1986·Clinical Physiology·D S GoldsteinH R Keiser
Jan 1, 1988·Journal of the American College of Cardiology·V D GoliU Thadani
Jun 4, 2016·Technology and Health Care : Official Journal of the European Society for Engineering and Medicine·Rodion StepanovSergey Chugainov
Jan 16, 2020·Journal of Medical Engineering & Technology·Jyoti V JetheG D Jindal

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