Purpose: Myocardial revascularization by coronary artery bypass grafting (CABG) in ischemic heart disease patients has direct impact on hemodynamic parameters in the immediate post-operative period. The peri-operative...Purpose: Myocardial revascularization by coronary artery bypass grafting (CABG) in ischemic heart disease patients has direct impact on hemodynamic parameters in the immediate post-operative period. The peri-operative cardiovascular functioning is an important determinant for outcome of surgery. In On-Pump CABG (ONCAB), the cardiopulmonary bypass has a negative effect on myocardium. Off-Pump CABG (OPCAB) avoids the effect of CPB but complete revascularization with difficult positioning of heart is technically demanding. This study is aimed to compare the cardiovascular functioning in the immediate post-operative period after OPCAB and ONCAB. Methods: Total 106 patients were operated for CABG from January 2015 to June 2016, of which 75 patients were operated for OPCAB and 31 patients were operated for ONCAB. For the comparison, hemodynamic parameters were measured during anesthesia before surgery, postoperatively after 1 and 4 hours (h) in the ICU, and in the morning after surgery, approximately after 20 h. Results: The time-dependent rise of hemodynamic parameters like Cardiac Output (CO), Cardiac Index (CI), Stroke volume (SV) and Left Ventricular Stroke Work Index (LVSWI) in the immediate post-operative hours (1 h and 4 h) are more predominant in OPCAB group than ONCAB group although the difference is eliminated mostly at 20 h. The better peripheral vasodilation after OPCAB causes immediate fall of Systemic Vascular Resistance Index (SVRI) after OPCAB. Conclusion: Better cardiovascular functioning immediately after OPCAB than ONCAB may be important for better hemodynamic stability. The difference is however eliminated after 24 hours indicating little significance in long term outcome.展开更多
Background: The off-pump coronary artery bypass graft surgery (OPCAB) may produce significant hemodynamic instability necessitating conversion to on-pump surgery. This study evaluated the hemodynamic parameters in pat...Background: The off-pump coronary artery bypass graft surgery (OPCAB) may produce significant hemodynamic instability necessitating conversion to on-pump surgery. This study evaluated the hemodynamic parameters in patients undergoing OPCAB using pericardial bands for stabilization of the coronary target sites. Methods: In 250 patients undergoing OPCAB the hemodynamic parameters including continuous cardiac output and systemic venous oxygen saturation (SvO2) were recorded at baseline after pericardiotomy, during each coronary artery anastomosis at 3, 5, 10, 15 min, and after release of the pericardial bands used for target stabilization. Vasopressors were used to maintain mean arterial pressure (MAP) > 60 mmHg. Results: SvO2 and cardiac index (CI) decreased significantly after target stabilization and during all coronary anastomoses with greater decreases noted during obtuse marginal branch of left circumflex (OM) anastomosis. The MAP and heart rate were maintained without significant change but central venous pressure increased significantly during all coronary anastomoses. The significant increase in pulmonary capillary wedge pressure and mean pulmonary artery pressure were noted only during anastomosis of the left anterior descending artery. The highest dose of vasopressor was used during OM anastomosis. Conclusions: During OPCAB surgery using pericardial bands for coronary target stabilization, MAP was maintained constantly, but SvO2 and CI decreased immediately after target stabilization and reduced further during all coronary artery anastomoses. During OM anastomosis SvO2 and CI were significantly lower as compared to that of LAD and right coronary artery. Careful monitoring and management of hemodynamic variables are warranted to avoid conversion to on-pump technique.展开更多
Objectives To elucidate the clinical relevance of nonlinear HRV with postoperative arrhythmias in patients undergoing off-pump CABG. Methods Twenty-seven elective off-pump CABG patients were recruited in the present ...Objectives To elucidate the clinical relevance of nonlinear HRV with postoperative arrhythmias in patients undergoing off-pump CABG. Methods Twenty-seven elective off-pump CABG patients were recruited in the present study. Atrial fibrillation （AF）, ventricular tachycardia （VT）, linear and nonlinear HRV were analysed using 24-hour electrocardiogram before and after surgery. Results All time domain （SDNN, pNN50 and rMSSD）, frequency domain （LF and HF） of linear measures of HRV variables and nonlinear measures of HRV variable, the short-term fractal-like correlation α1 decreased significantly after surgery. The postoperative nonlinear HRV variable α1 tended to be lower in patients with postoperative AF （ P = 0. 056 ）. Significant depressed α1 was found in patients with postoperative VT （P = 0. 022 ）. Elder patient＇s age and longer inotropic treatment time negatively correlated with postoperative α1. Conclusions Off-pump CABG procedures resulted in significant depressed of linear and nonlinear HRV variables. The depressed nonlinear HRV variables α1 related to age, inotropic supports and postoperative AF and VT.展开更多
目的对舒芬太尼和芬太尼麻醉下非体外循环冠脉搭桥手术（OPCAB）过程中的循环功能变化进行对比研究。方法66例患者随机分为芬太尼组和舒芬太尼组,两组分别应用芬太尼总量22.5μg/kg或舒芬太尼总量2.25μg/kg,持续静脉泵入异丙酚2~3 mg/...目的对舒芬太尼和芬太尼麻醉下非体外循环冠脉搭桥手术（OPCAB）过程中的循环功能变化进行对比研究。方法66例患者随机分为芬太尼组和舒芬太尼组,两组分别应用芬太尼总量22.5μg/kg或舒芬太尼总量2.25μg/kg,持续静脉泵入异丙酚2~3 mg/（kg.h）。监测混合静脉血氧饱和度（SvO2）、心率（HR）、平均动脉压（MAP）、平均肺动脉压（MPAP）、心指数（CI）、外周血管阻力指数（SVRI）、肺血管阻力指数（PVRI）和中心静脉压（CVP）。记录心电图ST段变化及血管活性药和镇静药使用情况。结果两组的HR和MAP在切皮、开胸、心脏移位等强刺激时间点均有增加（P〈0.05）,两组间比较,尤以芬太尼组显著（P〈0.05）;随着MAP和MPAP的升高变化,两组SVRI和PVRI均呈升高变化,芬太尼组变化较舒芬太尼组更为明显;两组SvO2在术中各时间点均有所降低,以心脏移位时最为明显（P〈0.05）,但两组间无显著差异;两组患者在术中所选时间点CI没有明显改变。芬太尼组的术后带管时间也较长（6.5 vs 5.7）。升压药和镇静药使用以及心电图ST段变化两组相似。结论舒芬太尼麻醉和芬太尼麻醉用于非体外循环冠脉搭桥手术,患者均能较好耐受术中血流动力学变化,但舒芬太尼表现出更好的循环稳定作用。展开更多
文摘Purpose: Myocardial revascularization by coronary artery bypass grafting (CABG) in ischemic heart disease patients has direct impact on hemodynamic parameters in the immediate post-operative period. The peri-operative cardiovascular functioning is an important determinant for outcome of surgery. In On-Pump CABG (ONCAB), the cardiopulmonary bypass has a negative effect on myocardium. Off-Pump CABG (OPCAB) avoids the effect of CPB but complete revascularization with difficult positioning of heart is technically demanding. This study is aimed to compare the cardiovascular functioning in the immediate post-operative period after OPCAB and ONCAB. Methods: Total 106 patients were operated for CABG from January 2015 to June 2016, of which 75 patients were operated for OPCAB and 31 patients were operated for ONCAB. For the comparison, hemodynamic parameters were measured during anesthesia before surgery, postoperatively after 1 and 4 hours (h) in the ICU, and in the morning after surgery, approximately after 20 h. Results: The time-dependent rise of hemodynamic parameters like Cardiac Output (CO), Cardiac Index (CI), Stroke volume (SV) and Left Ventricular Stroke Work Index (LVSWI) in the immediate post-operative hours (1 h and 4 h) are more predominant in OPCAB group than ONCAB group although the difference is eliminated mostly at 20 h. The better peripheral vasodilation after OPCAB causes immediate fall of Systemic Vascular Resistance Index (SVRI) after OPCAB. Conclusion: Better cardiovascular functioning immediately after OPCAB than ONCAB may be important for better hemodynamic stability. The difference is however eliminated after 24 hours indicating little significance in long term outcome.
文摘Background: The off-pump coronary artery bypass graft surgery (OPCAB) may produce significant hemodynamic instability necessitating conversion to on-pump surgery. This study evaluated the hemodynamic parameters in patients undergoing OPCAB using pericardial bands for stabilization of the coronary target sites. Methods: In 250 patients undergoing OPCAB the hemodynamic parameters including continuous cardiac output and systemic venous oxygen saturation (SvO2) were recorded at baseline after pericardiotomy, during each coronary artery anastomosis at 3, 5, 10, 15 min, and after release of the pericardial bands used for target stabilization. Vasopressors were used to maintain mean arterial pressure (MAP) > 60 mmHg. Results: SvO2 and cardiac index (CI) decreased significantly after target stabilization and during all coronary anastomoses with greater decreases noted during obtuse marginal branch of left circumflex (OM) anastomosis. The MAP and heart rate were maintained without significant change but central venous pressure increased significantly during all coronary anastomoses. The significant increase in pulmonary capillary wedge pressure and mean pulmonary artery pressure were noted only during anastomosis of the left anterior descending artery. The highest dose of vasopressor was used during OM anastomosis. Conclusions: During OPCAB surgery using pericardial bands for coronary target stabilization, MAP was maintained constantly, but SvO2 and CI decreased immediately after target stabilization and reduced further during all coronary artery anastomoses. During OM anastomosis SvO2 and CI were significantly lower as compared to that of LAD and right coronary artery. Careful monitoring and management of hemodynamic variables are warranted to avoid conversion to on-pump technique.
文摘Objectives To elucidate the clinical relevance of nonlinear HRV with postoperative arrhythmias in patients undergoing off-pump CABG. Methods Twenty-seven elective off-pump CABG patients were recruited in the present study. Atrial fibrillation （AF）, ventricular tachycardia （VT）, linear and nonlinear HRV were analysed using 24-hour electrocardiogram before and after surgery. Results All time domain （SDNN, pNN50 and rMSSD）, frequency domain （LF and HF） of linear measures of HRV variables and nonlinear measures of HRV variable, the short-term fractal-like correlation α1 decreased significantly after surgery. The postoperative nonlinear HRV variable α1 tended to be lower in patients with postoperative AF （ P = 0. 056 ）. Significant depressed α1 was found in patients with postoperative VT （P = 0. 022 ）. Elder patient＇s age and longer inotropic treatment time negatively correlated with postoperative α1. Conclusions Off-pump CABG procedures resulted in significant depressed of linear and nonlinear HRV variables. The depressed nonlinear HRV variables α1 related to age, inotropic supports and postoperative AF and VT.
文摘目的对舒芬太尼和芬太尼麻醉下非体外循环冠脉搭桥手术（OPCAB）过程中的循环功能变化进行对比研究。方法66例患者随机分为芬太尼组和舒芬太尼组,两组分别应用芬太尼总量22.5μg/kg或舒芬太尼总量2.25μg/kg,持续静脉泵入异丙酚2~3 mg/（kg.h）。监测混合静脉血氧饱和度（SvO2）、心率（HR）、平均动脉压（MAP）、平均肺动脉压（MPAP）、心指数（CI）、外周血管阻力指数（SVRI）、肺血管阻力指数（PVRI）和中心静脉压（CVP）。记录心电图ST段变化及血管活性药和镇静药使用情况。结果两组的HR和MAP在切皮、开胸、心脏移位等强刺激时间点均有增加（P〈0.05）,两组间比较,尤以芬太尼组显著（P〈0.05）;随着MAP和MPAP的升高变化,两组SVRI和PVRI均呈升高变化,芬太尼组变化较舒芬太尼组更为明显;两组SvO2在术中各时间点均有所降低,以心脏移位时最为明显（P〈0.05）,但两组间无显著差异;两组患者在术中所选时间点CI没有明显改变。芬太尼组的术后带管时间也较长（6.5 vs 5.7）。升压药和镇静药使用以及心电图ST段变化两组相似。结论舒芬太尼麻醉和芬太尼麻醉用于非体外循环冠脉搭桥手术,患者均能较好耐受术中血流动力学变化,但舒芬太尼表现出更好的循环稳定作用。
