Effects of Human Electro‐Muscular Incapacitation (HEMI) Devices on Cardiovascular Changes in Anesthetized Swine as Measured by Transesophageal Echocardiography (TEE)

The abundance of, and reliance upon, human electro‐muscular incapacitation (HEMI) devices, especially in law enforcement, has generated scrutiny and examination of these technologies. The purpose of this study was to examine cardiovascular effects resulting from typical (5 sec) and longer activation (20 sec) HEMI applications studying myocardial function and peripheral vascular system using a combination of invasive cardiovascular catheters and transesophageal echocardiography (TEE). Six healthy swine (Sus scrofa) 3–5 months in age and weighing between 60 and 86 kg were anesthetized and exposed to the TASER Model X26 waveform while transesophageal echocardiography was performed. Stroke volume was shown to statistically decrease during HEMI application indicating an increase in systemic vascular resistance, but HEMI application did not result in myocardial dysfunction (“cardiac stunning”).     

舒心汤治疗舒张性心力衰竭30例临床研究

目的 观察舒心汤治疗舒张性心力衰竭（diastolicheartfailure,DHF）患者的临床疗效,探究其作用机制。方法 将60例DHF患者随机分为对照组（30例）和治疗组（30例）,对照组接受常规西药治疗,治疗组在常规西药治疗的基础上加用舒心汤治疗,疗程2周。观察并比较两组心功能疗效;治疗前后分别测定两组患者超声心动图E/A比值,以及血清脑钠肽（brainnatriureticpeptide,BNP）、一氧化氮（nitricoxide,NO）、内皮素-1（endothelin-1,ET-1）水平。结果 两组心功能疗效比较,差异无统计学意义（P>0.05）;两组治疗后E/A比值和血清NO水平均较治疗前显著升高（P＜0.01）,血清BNP和ET-1水平均显著降低（P＜0.01）,治疗组在升高E/A比值和血清NO水平方面显著优于对照组（P＜0.01）。结论 舒心汤联合常规西药可以改善DHF患者的心功能,在升高超声心动图E/A比值和血清NO水平方面较常规西药具有明显优势。