Effect of heat shock (HS) treatment on angiotensin II (Ang II)–induced hypertension in rats. HS was administered 24 hours before initiation of Ang II infusion. Systolic blood pressure was measured at days 0, 1, 3, 5, 7, 11, and 14 of Ang II infusion. Data points represent mean ± SEM (n = 6). *P < 0.01, d0 vs d1 to d14 Ang; P < 0.05, d0 vs d1 HS + Ang; P < 0.01, d0 vs d3 to d14 HS + Ang; #P < 0.01, d3 to d14, Ang vs HS + Ang