Spotnitz, H M Pulse-transit sonomicrometry. [electronic resource] - The Annals of thoracic surgery Oct 1983 - 493-4 p. digital Publication Type: Letter ISSN: 0003-4975 Standard No.: 10.1016/s0003-4975(10)60497-3 doi Subjects--Topical Terms: Heart Function TestsHumansUltrasonography