Isochronal map of chest wall vibration with cardiokymography.
Mapping analysis of cardiokymography is helpful in clarifying the relationship between vibratory pattern and recording sites, but needs a highly stable recording technique. We have therefore studied the stability of recording cardiokymograms, and present here a new method for creating stable maps which enables diagnosis of chest-wall vibration abnormalities. Cardiokymograms were recorded on 16 points of the chest wall located at regular intervals horizontally and vertically. The time interval between a R-wave peak of the electrocardiograms and an E-point of the cardiokymograms were measured for all the 16 records. Isochronal maps in 23 healthy subjects were classified into four types. The map of a patient with myocardial infarction was quite different from any one of the four normal patterns and seemed to show a paradoxical movement of the chest wall.
Okada
M
M
Department of Laboratory Medicine, Niigata University School of Medicine, Japan.
Nakajima
T
T
Eizuka
N
N
Saitoh
Y
Y
Yakata
M
M
D000328:Adult; D004562:Electrocardiography; D006334:Heart Function Tests / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007734:Kymography / Q000295:instrumentation; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis; D012815:Signal Processing, Computer-Assisted; D014732:Vibration