^ 



ffl 



B 





Fio. 228. RrcoRDS OF HEART SOUNDS; Taken simultaneously with the carotid pulse? 



and electro-cardiogram. 



I'pperniost curve, electro-cardio^rram (Lead II.). 



Lowest curve, movements of a second string of the jralvanometer, connect cd witli a inicro]>lione OMT the 



heart. 



A, Noi null record from the doif. 



The carotut pulse is interjwsed between the other two. Time in s ' n th sec. 



Tin- continuous vertical line marks the lie^iiinin^r of the ventricular systole, the dotted line the end. 

 II, Heart sounds from a ]>atient with incompetent mitral valve. The murmur (systolic) is at SJ/., of 



rapid rate of vibration, and in the niiddle of the ventri<-nl;ir systole. 

 C, From a case of incompetent aortic valres, trivinjr a musical murmur during the whole of diastole. 



(Lewis, 1913, 2, Figs. 3, 15, and 18, Quart.. Jl. o 



676 



