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The P wave of the magnetocardiogram (MCG) was investigated in normal subjects and patients with mitral stenosis to determine its characteristics in normal conditions and left atrial overloading (LAO) and to analyze atrial activation by a magnetic field. In normal subjects, the MCG P wave was negative in left parasternal sites and positive in right lower sternal sites. The current source deduced from the MCG pattern and isomagnetic map was directed inferiorly and to the left through the entire phase of atrial activation, suggesting that in most normal cases the P wave reflects right atrial activity. In patients with mitral stenosis, a negative-positive biphasic P wave was seen more frequently than in normal subjects in left parasternal sites (p less than 0.005). In the late phase of atrial activation, the current source deduced from the isomagnetic map was shifted superiorly and to the left, suggesting an increased leftward force due to LAO. The MCG was similar in sensitivity to the ECG, for diagnosis of LAO, but in a few cases LAO could be detected from the MCG but not the ECG. These findings suggest that the MCG is clinically useful for diagnosis of LAO.
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
April 1983,
Hospital practice (Office ed.),
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
June 1961,
American heart journal,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
December 1987,
The Tokushima journal of experimental medicine,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
November 1966,
British heart journal,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
January 1973,
Bulletin de physio-pathologie respiratoire,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
October 1948,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
November 1998,
The American journal of cardiology,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
January 2007,
The International journal of angiology : official publication of the International College of Angiology, Inc,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
September 1982,
Archives of internal medicine,
M Sumi, and
A Takeuchi, and
M Katayama, and
Y Fukuda, and
M Nomura, and
K Fujino, and
M Murakami, and
Y Nakaya, and
H Mori
May 1957,
Circulation,
