Photoplethysmography and electrocardiography for real time evaluation of pulse transit time A diagnostic marker of peripheral vascular diseases
1967 ◽
Vol 119
(6)
◽
pp. 593-599
◽
1953 ◽
Vol 14
(6)
◽
pp. 537-539
◽
1953 ◽
Vol 14
(4)
◽
pp. 335-337
◽