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Pulsus parvus et tardus. Home Â» Pulsus parvus et tardus. pulsus tardus et parvus, more commonly known as slow-rising pulse, is a sign where, on palpation of the pulse, the pulse is late (tardus) (relative to contraction of the heart) and weak/small (parvus). Classically, it is seen in aortic valve stenosis.
describe Distal (downstream) Pulsatility Changes. -Dampened appearance-Longer acceleration time to reach peak systole-Tardus parvus phenomena â¢Tardus-delayed arrival of systolic peak â¢Parvus-overall low velocity-Visual assessment-Quantitative measurement â¢Acceleration time â¢Acceleration index.escribe PRF. â¢PRF for color flow image is shown â¢PRF for Spectral is shown-and is considerably higher Remember- â¢CFI is based on averageDoppler frequency shift velocity â¢Spectral Doppler values are shown as absolutes.