title: [A simplified arteriographic analysis of systolic pressure and of the pressure-time index].
abstract: Systolic stress has been measured in 20 ms periods during ventricular ejection by monoplanar angiographic method, both under basal conditions and after infusion of trinitro-glycerine (TNG) in 8 coronary patients. None of them showed significant segmental contraction abnormality. No correlation was found between the corresponding values of mean systolic stress sigma and mean systolic pressure P, either under basal conditions (r=0.48) or after reduction of the load (r=0.24). On the other hand, values of sigma correlated closely with the corresponding values of the stress sigmas at the end of the isovolumic contraction phase, both under basal conditions (r=0.95) and after TNG (r=0.98. A similar correlation was found between the corresponding values of the peak of systolic stress and of sigmas both under basal conditions (r=0.94) and after TNG (r=0.96). Determination of sigmas is technically simple, and only requires the calculation of ventricular end-diastolic volume, together with measurement of end-diastolic thickness and aortic diastolic pressure. This simplified angiographic method is useful to express the determinants of myocardial energy using parietal stress values instead of intracavitary pressure values.
mesh_terms: D000792:Angiography / Q000379:methods*; D001794:Blood Pressure / Q000187:drug effects; D003327:Coronary Disease / Q000188:drug therapy / Q000503:physiopathology; D006801:Humans; D009200:Myocardial Contraction / Q000187:drug effects; D005996:Nitroglycerin / Q000494:pharmacology / Q000627:therapeutic use; D010101:Oxygen Consumption; D013318:Stroke Volume / Q000187:drug effects; D013599:Systole / Q000187:drug effects
chemical_list: D005996:Nitroglycerin
vernacular_title: Evaluation angiographique simplifiée de la tension systolique et de l'index tension-temps.