Determination of systolic time intervals using the apex cardiogram and its first derivative

1972 ◽  
Vol 30 (3) ◽  
pp. 217-221 ◽  
Author(s):  
George Gábor ◽  
Ivan Porubszky ◽  
Peter Kálmán
1993 ◽  
Vol 36 (1-2) ◽  
pp. 43-50 ◽  
Author(s):  
K.R. Visser ◽  
G.A. Mook ◽  
E. van der Wall ◽  
W.G. Zijlstra

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