Sprung C L
Chest. 1979 Mar;75(3):362-6. doi: 10.1378/chest.75.3.362.
Serial hemodynamic alterations were investigated in seven elderly patients with heat stroke. Their mean age was 72 +/- 6 years. The circulatory response to heat stroke was either hyperdynamic of hypodynamic. Two patients had increased cardiac index (4.3 and 4.4 L/min/m2), increased right atrial pressure (10 and 12 mm Hg), normal pulmonary capillary wedge pressure (10 and 12 mm Hg), and decreased systemic vascular resistance (542 and 738 dyne.sec.cm-5). Five patients had decreased cardiac index (mean 2.3 +/- 0.2 L/min/m2), decreased right atrial pressure (mean 2 +/- 1 mm Hg), normal pulmonary capillary wedge pressure (mean 6 +/- 3 mm Hg), and increased systemic vascular resistance (mean 2020 +/- 204 dyne.sec.cm-5). Circulatory failure appears to be secondary to peripheral pooling of blood or hypovolemia. The inability to compensate hemodynamically when stressed by heat may predispose certain elderly individuals to develop heat stroke.
对7例老年中暑患者的血流动力学改变进行了系列研究。他们的平均年龄为72±6岁。中暑时的循环反应呈高动力型或低动力型。2例患者心脏指数增加（分别为4.3和4.4L/min/m²），右心房压力升高（分别为10和12mmHg），肺毛细血管楔压正常（分别为10和12mmHg），全身血管阻力降低（分别为542和738达因·秒·厘米⁻⁵）。5例患者心脏指数降低（平均2.3±0.2L/min/m²），右心房压力降低（平均2±1mmHg），肺毛细血管楔压正常（平均6±3mmHg），全身血管阻力增加（平均2020±204达因·秒·厘米⁻⁵）。循环衰竭似乎继发于外周血液淤积或血容量不足。受热应激时无法进行血流动力学代偿可能使某些老年人易患中暑。
