INDEX 



755 



activation-inactivation, 252, 261 

 compared to potassium, 251 

 components of ionic current, 253 

 epinephrine, 278 

 kinetics of, 235 

 steady-state activation, 255 

 time course of activation. 254 

 transmembrane potential and, 253 

 Sodium transport 

 active, 243 



pump and, 244 

 steady state and, 245 

 calcium and, 391 

 litliium and, 163 

 passive, 243 



pump, nonelectrogenic nature, 159 

 quinidine and, 1 78 

 regenerative, 246 

 Spasm 



critical closing pressure, 99 

 Specific activity 

 definition, 621 

 Spectrophotometric methods 



for oxygen determination, 425 

 Squid axon 



calcium influx in, 169 

 Squid axoplasm 



Ca" equilibration in, 168 

 calcium content of, 167 

 ST interval 

 displacement 



by injury potentials, 381 

 duration, 380-381 

 theory, 380-381 

 heart rate and, 380 

 in local lesions, 380 

 interpretation, 380 

 ionic changes and, 365 

 mechanism of change, 317 

 myocardial damage and, 380 

 normal characteristics, 379 

 see also Electrocardiogram 

 Staircase: see Bowditch staircase; Reverse 



staircase; Treppe 

 Starling's law of the heart 



circulatory regulation and, 527 

 definition, 7 

 Stationarity 



definition, 589 

 Stellate ganglion 

 left 



graded stimulation, ventricle and, 



506 

 stimulation, atrium and, 511 

 ventricle and, 505, 507, 508 

 stimulation, cardiac cycle and, 512 

 LVED pressure-length relation, 507 

 stroke volume and, 509 

 stroke work and, 509 

 ventricle and, 503 

 ventricular function curves and, 504 



see also Autonomic nerves; Cardiac 

 sympathetic nerve 

 Stenotic index 



volume of flow and, 646 

 Stress 



blood volume and, 57 

 Stress-strain relations 



rubber-like materials, 1 1 1 

 Stroke index 



arterial distensibility and, 557 



definition, 560 



Fick procedure compared to pulse- 

 pressure measurement, 558 

 Stroke volume 



aortic pressure and, 493 



as function of diastolic volume, 1 57 



ballistocardiogram, 562, 560 



by different methods, 562, 563 



cardiac output and, 548 



definition, 3 



diastolic volume and, 157 



exercise and, 545 



exertion and, 594 



Fick, dye dilution methods and, 558 



homeometric autoregulation and, 498 



impact of surge of blood, 562 



left ventricular cavity area, 567 



mitral regurgitation and, 666 



pulse contour and, 558-562 



pulse pressure and, 557, 558 



relation to stroke work, 156 



resistance and, 493 



stellate stimulation and, 509 



translocation of successive, 2 



values for, 6 

 Stroke work 



aortic pressure and, 493 



definition, 156 



LEVD pressure and, 491, 509 



myocardial segment length and, 491 



mechanical systole duration and, 710 



relation to stroke volume, 156 



stellate stimulation and, 509 



ventricular synchronicity and, 510 

 Strontium 



action potential and, 172 

 Strophanthin : see Cardiac glycosides 

 Superior vena caval syndrome 



definition, 420 

 Sympathetic stimulation 



cardiac autorhymicity and, 277 



cardiac nerve 

 atrium and, 510 

 ventricle and, 503 



see also Autonomic nerve; Vagus ner\'e 

 Systemic vascular resistance 



total, in man, 440 

 Systole 



arterial pressures in, 559 

 Systolic click 



definition, 714 



Systolic discharge 



definition, 3 

 Systolic gallop 



definition, 713 

 Systolic-pressure ratio 



size of ventricular septal defect and, 455 



T-I824: see Evans blue 

 T wave 



adrenaline and, 389 

 anoxia, hypoxia and, 387 

 area 



spatial, azimuthal and elevational 

 angles of, 372 



vector analysis, 357 

 autonomic activity and, 389 

 in A-V block, 368 

 interpretation, 354, 363 

 local changes and, 365 

 loop, maximal vector, 374 

 noradrenaline and, 389 

 pheochromocytoma and, 389 

 potassium efflux and, 160 

 potassium intoxication and, 391 

 T-Q depression, 318 

 vector analysis of, 377 

 see also Electroceirdiogram 

 Talbot, S. A. 



Technical aspects of the study of 



cardiovascular sound, 68 1 -694 

 Tension 

 active, 91 



critical closing pressure and, 97 



equilibrium and, 96 



equilibrium diagram, 95 



in smooth muscle, 102 



in wall, formula, 104 



null method measurement, 102 



plus elastic, equilibrium and, 96 

 critical closing active, 97 

 elastic, 91 



equilibrium and, 96 



equilibrium diagi'am, 95 



Hooke's law, 1 09 



in wall, formula, 1 04 

 maintenance, 91 

 twitch 



Ca and, 166, 170 



stimulation, parameters and, 1 73 

 Tetralogy of Fallot 



arterial oxygen saturation, 472 

 characterization, 420 

 description, 469 

 hemodynamics in, 472 

 oveniding of aorta in, 472 

 Thiamin 



in heart, 211, 228 

 in skeletal muscle, 228 

 Thoracotomy 



heart size and, 541 

 Thorax 



inhomeogeneities of conductance, 337 



