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Table 2 Comparison of Doppler flow measured PWV and calculated EaI by pressure-volume loop analysis

From: In vivo assessment of arterial stiffness in the isoflurane anesthetized spontaneously hypertensive rat

   Doppler ultrasound Pressure-volume loops
Age n Weight (g) Heart rate (bpm) PWV (m/sec) Heart rate (bpm) EaI (mmHg/μl/g)
SHR (young) 10/8 289 ± 9 439 ± 34 8.0 ± 0.8 346 ± 29* 97 ± 16
SHR (old) 10/7 388 ± 26 432 ± 32 13.2 ± 2 328 ± 38* 120 ± 20
   P < 0.001 NS P < 0.001 NS P < 0.05
  1. Data are presented as mean ± SD.
  2. *P <0.0001 vs. heart rate measured by ultrasound.