The prolongation of the isometric (tension) period (TP) of the left ventricle which occurred in the majority (72 per cent) of all cases after unilateral or bilateral transthoracic sympathectomy (without or with unilateral or bilateral transthoracic splanchnicotomy) indicates a diminution of inotropic cardiac action. It can be assumed to correspond to the cholinergic (vagal) preponderance which results from a partial or complete sympathetic denervation of the heart. Reduction of the pulse pressure oc-
curred in 56 per cent of the cases, probably due to the same mechanism.
www.chestjournal.org/content/38/4/423.full.pdfby W RAAB - 1960
www.chestjournal.org/content/38/4/423.full.pdfby W RAAB - 1960