What's the difference between dicrotism and polycrotism?
Dicrotism
Definition:
(n.) A condition in which there are two beats or waves of the arterial pulse to each beat of the heart.
Example Sentences:
(1) an improvement of the REG parameters is observed: increase of the amplitude and decrease of the values of the relative part and dicrotic index.
(2) LVESP calculated by this method and systolic blood pressure measured by the cuff were compared with aortic dicrotic notch pressures obtained by a catheter-tip manometer system as true LVESP.
(3) caused an increase of the amplitude and a decrease of the anacrote, of its relative part, and the dicrotic index, changes indicating a lowering of the cerebrovascular resistance.
(4) 3) When the light-collecting fibre was placed less than 0.5 mm from the gingival surface, clear dicrotic notches were seen in RLP.
(5) We noted a significant negative correlation between the arterial level of plasma norepinephrine and the amount of modulation of the dicrotic wave after nitroglycerin among subjects 40 yr old or younger, suggesting a sympathetic neurogenic contribution to the vascular abnormalities observed in relatively young patients with essential hypertension.
(6) Initially, the balloon was inflated at the aortic dicrotic notch and deflated before the next systole; subsequently, the inflation time was moved progressively earlier in 30-ms steps.
(7) End-systolic pressure was measured at the dicrotic notch of the arterial pressure tracing and end-systolic LV dimensions at the time of aortic valve closure.
(8) The features of pulse waves of hypertensive patients were that (t) was short even in the supine position, and that dicrotic wave was small or absent especially for toe pulse.
(9) The following REG parameters were assayed: anacrotic section of the curve and its relative part, amplitude and dicrotic index.
(10) Hence the use of the radial artery dicrotic notch as an estimate of end systole is unreliable.
(11) These oscillations resembled the wave forms of arterial pulsations with steep upstroke and dicrotic notch when the pressure amplitudes were above 10 mmHg.
(12) Subsequently digital plethysmography (systolic a-wave, dicrotic b-wave and the c-incisura) was monitored for 2 h. After administration of the NTG-containing sprays (NR and NT) the median a-wave increased rapidly, the median c-incisura deepened and the median b-wave rose slightly.
(13) It was found that the presence of the dicrotic notch in the uterine artery time-velocity waveform is the result of wave reflection and that a persistent notch past 20 weeks' gestation may be indicative of an abnormally high placental bed resistance.
(14) Physicians set up presumed value for the left ventricular endodiastolic pressure, a search area for the dicrotic notch, a threshold for the onset of the up-slope and the corresponding value of the calibration signal on the digital switches of the calculator.
(15) At cardiac catheterization the configuration of the pressure tracing in the main pulmonary artery is typical, showing an abrupt rise and fall of the systolic wave followed by a low situated dicrotic notch.
(16) We apply a pulse-wave theory to a model of the human arm arterial system that predicts the changes in the arterial pressure waveform as it traverses the vasculature (increased pulse pressure, sharper main wave, disappearance of the aortic incisura, and appearance of a diastolic dicrotic wave) and also predicts the observed modulation of the waveform during phenylephrine-induced vasoconstriction and nitroglycerin-induced vasodilation.
(17) At the foot the systolic and pulse pressures were greater and the dicrotic wave more prominent.
(18) Under control conditions, the shape of the finger waveform differed from the brachial-artery waveform in terms of: (1) a more peaked appearance; (2) a dicrotic notch (Pnotch) which is located at a lower percentage of pulse pressure; and (3) a larger pulsatile-systolic area.
(19) Dicrotic notch duration was significantly reduced and dicrotic notch pressure enhanced; in 34 women both of these abnormalities were present.
(20) Type I was further classified into subgroups Ia and Ib according to the magnitude of the tidal wave, and type II was subdivided into IIa and IIb according to the magnitude of the dicrotic notch.
Polycrotism
Definition:
(n.) That state or condition of the pulse in which the pulse curve, or sphygmogram, shows several secondary crests or elevations; -- contrasted with monocrotism and dicrotism.
Example Sentences:
(1) It is shown that the polycrotic pulse form is characteristic hyperactivity of the sympathetic nervous system with the hypertonic, as well as the hypotonic forms of manifestation.