Figure 1. Systolic blood pressure of WKY, SHR, CGS WKY, and CGS SHR, as measured by tail-cuff plethysmography (n=5 for WKY and SHR; n=7 for CGS WKY and CGS SHR).

Ten consecutive blood pressure measurements were made and averaged for each animal. One-tailed Student's t test: *P < 0.01 WKY versus SHR; **P < 0.01 SHR versus CGS SHR; ***P < 0.01 WKY versus CGS WKY. Single-factor ANOVA: P < 0.01 among WKY, SHR, CGS WKY, and CGS SHR (not shown).