The Experts below are selected from a list of 27834 Experts worldwide ranked by ideXlab platform
Robert A Phillips - One of the best experts on this subject based on the ideXlab platform.
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nonInvasive cardiac output accuracy between the ultrasound cardiac output monitor and the esophageal doppler monitor
Critical Care, 2007Co-Authors: Robert Bilkovski, J De Martini, Robert A PhillipsAbstract:The hypothesis is that measurement of the cardiac index (CI) is accurate between the ultrasound cardiac output monitor (USCOM) and the esophageal Doppler monitor (EDM). The EDM is a minimally Invasive Device that has demonstrated strong correlation with cardiac output measurements obtained by thermodilution. A disadvantage of the EDM is the need for probe placement in the esophagus, effectively limiting its use to mechanically ventilated patients. The USCOM, in contrast, can measure cardiac hemodynamics by use of a CW Doppler probe placed on the skin to measure blood flow across either the aortic or pulmonic valve.
S. Abdallah - One of the best experts on this subject based on the ideXlab platform.
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212 ultrasound cardiac output monitor measurements in pediatric cardiac transplant patients
Journal of Heart and Lung Transplantation, 2007Co-Authors: J H Eguchi, Ranae L Larsen, A Deamaya, Richard E Chinnock, Mudit Mathur, Leonard L. Bailey, S. AbdallahAbstract:Purpose: The ultrasound cardiac output monitor (USCOM) is an FDA approved non-Invasive Device that can quickly determine cardiac output based on outflow tract velocity measured by continuous doppler and outflow valvular surface area deduced by patients’ height and weight. This investigation examines USCOM measurements in pediatric cardiac transplant patients. Methods and Materials: Following IRB approval and informed consent, USCOM readings were obtained during routine outpatient visits from June to August 2006. Measurements included cardiac index (CI), aortic valve diameter (AVD) and velocity through the aortic valve (VAV). Aortic valve velocities were compared to readings obtained by echocardiogram (ECHO) performed using the paired t-test with statistical significance at p-value 0.05. Results: 16 boys and 15 girls met study entry criteria. Mean age was 11.5 years and mean weight was 42.2 kg (range 12.3 to 146 kg). A single USCOM reading was obtained on each patient. Each USCOM measurement took less than 10 minutes to perform. USCOM derived mean CI was 4.42 L/min/m( /1.74). Mean USCOM VAV (1.13 /0.36 m/sec) was no different than that measured by ECHO (1.14 /0.16 m/sec), p 0.46. However, mean USCOM derived AVD (1.69 cm) was smaller than that measured by ECHO (2.32 cm). This is attributable to fact that the cardiac grafts are typically larger than the recipients’ expected AVD calculated using height and weight. All children appeared healthy and active on discharge from clinic. One child later requiring ICU admission for sepsis had a 50% decrement in CI from his USCOM baseline which also correlated with moderate to severe decrease in graft function on ECHO. Conclusions: VAV in children undergoing heart transplantation obtained by the USCOM Device appeared no different from that measured by ECHO, though measured and calculated AVD may vary. USCOM derived CI appears to reasonably portray these patients’ clinical condition. USCOM may be a useful rapid screening tool to assess deviations from the baseline in pediatric heart transplant recipients.
Ji Zhixian - One of the best experts on this subject based on the ideXlab platform.
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minimally Invasive perventricular Device closure of an isolated perimembranous ventricular septal defect with a newly designed delivery system preliminary experience
The Journal of Thoracic and Cardiovascular Surgery, 2009Co-Authors: Xing Quansheng, Pan Silin, Zhuang Zhongyun, Rong Youbao, Li Shengde, Cao Qian, Duan Shuhua, Hou Kefeng, Ji ZhixianAbstract:Objective We sought to summarize the preliminary clinical experience of minimally Invasive transthoracic Device closure of perimembranous ventricular septal defects with a new delivery system without cardiopulmonary bypass. Methods Twenty-one patients aged 11 months to 12 years (median age, 3.6 years) with isolated perimembranous ventricular septal defects underwent minimally Invasive Device closure with an inferior sternotomy of 3 to 5 cm under transesophageal echocardiographic guidance. A single per–right ventricular U-like suture was established, and a new delivery system was introduced, aided by a 16-gauge trocar, including a guidewire, proper sheath, and loading sheath. The proper size of Devices was determined by means of transesophageal echocardiographic analysis, and then the Device was released under real-time transesophageal echocardiographic monitoring if no significant aortic regurgitation, abnormal atrioventricular valvular motion, or residual interventricular shunt appeared. Results All of the defects were successfully closed. No residual shunt, noticeable aortic or tricuspid regurgitation, or significant arrhythmias appeared during more than 5 months of follow-up. Conclusion Minimally Invasive transthoracic Device closure of perimembranous ventricular septal defects with a new delivery system without cardiopulmonary bypass is feasible and safe under transesophageal echocardiographic guidance. However, it is necessary to evaluate the intermediate and long-term results.
Sztark Francois - One of the best experts on this subject based on the ideXlab platform.
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cardiac output measurement in patients undergoing liver transplantation pulmonary artery catheter versus uncalibrated arterial pressure waveform analysis
Anesthesia & Analgesia, 2008Co-Authors: Biais Matthieu, Nouettegaulain Karine, Cottenceau Vincent, Vallet Alain, Cochard Jean Francois, Revel Philippe, Sztark FrancoisAbstract:BACKGROUND:Cardiac output (CO) and Invasive hemodynamic measurements are useful during liver transplantation. The pulmonary artery catheter (PAC) is commonly used for these patients, despite the potential complications. Recently, a less Invasive Device (Vigileo®/FloTrac™) became available, which est
Robert Bilkovski - One of the best experts on this subject based on the ideXlab platform.
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nonInvasive cardiac output accuracy between the ultrasound cardiac output monitor and the esophageal doppler monitor
Critical Care, 2007Co-Authors: Robert Bilkovski, J De Martini, Robert A PhillipsAbstract:The hypothesis is that measurement of the cardiac index (CI) is accurate between the ultrasound cardiac output monitor (USCOM) and the esophageal Doppler monitor (EDM). The EDM is a minimally Invasive Device that has demonstrated strong correlation with cardiac output measurements obtained by thermodilution. A disadvantage of the EDM is the need for probe placement in the esophagus, effectively limiting its use to mechanically ventilated patients. The USCOM, in contrast, can measure cardiac hemodynamics by use of a CW Doppler probe placed on the skin to measure blood flow across either the aortic or pulmonic valve.
