Abstract: A portable electrocardiogram storing apparatus has an electrocardiogram amplifier, an A/D converter for sampling the amplifier output and converting it into a digital signal, a patient actuatable switch, a plurality of electrocardiogram memories, and means for selecting one of the memories for storing the digital signal when the switch is actuated. A time memory is also provided for storing a time when the apparatus is set, and a timer measures a lapse time after the setting. A selected electrocardiogram memory also stores the content of the timer at the time a respective digital signal is stored therein.

Abstract: A vascular prosthesis intended principally for use as an intraluminal graft has a flexible tubular main body, a cushioning tube of a flexible, compressible, and suturable Dacron felt secured coaxially to each end of the main body, and two reinforcing rings of stainless steel secured coaxially to opposite ends of each cushioning tube in substantially imbedded state therein, the cushioning tubes at parts thereof between the rings being radially compressible upon being clamped by ligating means, which is thereby prevented from shifting. This prosthesis is particularly effective as an intraluminal graft for surgical treatment of dissecting aortic aneurysm.