Effects of Hypertonic Saline and Dextran 70 on Cardiac Diastolic Function after Hemorrhagic Shock

• Published in: The Journal of surgical research Vol. 107; no. 1; pp. 27 - 36
• Main Author: Ogino, Ryukoh
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.09.2002; Elsevier
• Subjects: Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy; Animals; Biological and medical sciences; Blood Pressure; Blood Volume; cardiac diastolic function; Diastole; distensibility; elasticity; Emergency and intensive cardiocirculatory care. Cardiogenic shock. Coronary intensive care; end-diastolic pressure–volume relationship; Gases - blood; Heart - physiopathology; Hemodynamics; hemorrhagic shock; HSD; Hydrogen-Ion Concentration; hypertonic saline; Intensive care medicine; Lactic Acid - blood; Medical sciences; Myocardial Contraction - drug effects; peak negative dP/ dt; relaxation; Saline Solution, Hypertonic - pharmacology; Sheep; Shock, Hemorrhagic - blood; Shock, Hemorrhagic - physiopathology; cardiac diastolic function; distensibility; peak negative dP/ dt; hypertonic saline; elasticity; relaxation; hemorrhagic shock; HSD; end-diastolic pressure–volume relationship; Shock; Cardiac performance; Diastole; Cardiovascular disease; Hemorrhage; Vascular disease; Hypertonic solution; Ungulata; Resuscitation; end-diastolic pressure-volume relationship; Experimental study; Dextran; Vertebrata; Mammalia; Animal; Sheep; Artiodactyla; Saline solution; peak negative dP/dt
• ISSN: 0022-4804; 1095-8673
• DOI: 10.1006/jsre.2002.6490

Background. A bolus of 7.5% NaCl-6% Dextran 70 (HSD) is effective in resuscitating hypovolemic shock. Common hemodynamic findings with HSD are restoration of cardiac output, increased blood pressure, and improvement of peripheral circulation. However, the effect of HSD upon cardiac function is still controversial. In our previous study, when HSD did not improve cardiac contractility, it was speculated that it might affect cardiac diastolic function without a change in contractility. Therefore, we studied the effects of HSD on cardiac diastolic function. Methods. Hemorrhagic shock was created by exsanguination of 31.4 ± 0.9 ml/kg (NS group) or 29.0 ± 3.6 ml/kg (HSD group). Then mean BP was maintained at 50 mm Hg for 30 min in both groups. The HSD group ( n = 6) received HSD (4 ml/kg) and the NS (control) group ( n = 5) received normal saline (40 ml/kg) after the shock. Cardiac diastolic functions were measured in both groups using the peak negative dP/ dt and the left ventricular end-diastolic pressure-volume relationship (EDPVR) during the experimental period: before shock, immediately, and 2 h after resuscitation. Results. Hemodynamic parameters in both groups demonstrated similar changes throughout the experimental period. The peak negative dP/ dt, stiffness constant, and elasticity obtained by EDPVR did not differ significantly between the two groups. Conclusion. HSD seems to be an effective resuscitation fluid after hemorrhagic shock because the volume of HSD required to maintain circulation is significantly smaller than that of normal saline. However, our data revealed that HSD does not change cardiac diastolic function after hemorrhagic shock.