Search Results
Results 451 - 500 of 978
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Krishnamurthy B - - 1997
This study was carried out to evaluate the ease of use and reliability of cardiac output estimations performed by an oesophageal Doppler monitor and to compare its use with that of a continuous cardiac output pulmonary flotation catheter. Measurements were made during and after surgery in 16 patients scheduled to ...
Larrea L - - 1997
Since the discovery of the differentiating activity of all-trans retinoic acid (ATRA) in acute promyelocytic leukemia (APL), the treatment of this disease has greatly improved. Currently, the combination of ATRA and chemotherapy is considered the best treatment for patients with APL. This approach has consistently extended the remission rate and ...
McLean A S - - 1997
We evaluated the accuracy of cardiac output estimations by three transthoracic echocardiographic techniques in critically ill subjects. This study was a prospective comparison study carried out in a general intensive care unit of a teaching hospital. The subjects had a broad range of diagnoses including pulmonary embolus, cardiogenic shock, septic ...
Lafay V - - 1997
To determine the influence of a saturation dive on cardiac function, Doppler-echocardiographic measurements were compared at sea level and during a 36 atm (3,650 kPa) He-O2 dive (gas density: 7 g/liter) in four healthy men. Left ventricular systolic function was studied from time motion measurements. Transmitral flow (E:A ratio) and ...
Sarmiento X - - 1997
STUDY OBJECTIVE: To assess the prognostic performance of general severity systems (APACHE II [acute physiology and chronic health evaluation], simplified acute physiology score [SAPS II], and mortality probability models [MPM II]) in coronary patients and to derive new customized indexes for coronary patients using a reduced number of variables. DESIGN: ...
Arthur P G - - 1997
We examined the possibility that the heart of the tuttle Chrysemys scripta is an exceptional anaerobic performer, by measuring myocardial power output, lactate output, and estimated ATP turnover in perfused heart preparations. Over a range of myocardial power outputs at 5 and 15 degrees C we find that turtle hearts ...
Raney J L - - 1997
Penetrating trauma is a frequent presentation to urban emergency departments (EDs). Pericardial effusion with cardiac tamponade is a possible complication of penetrating trauma to the chest, to the back, and to the upper abdomen. Even if patients are stable initially without signs or symptoms of cardiac tamponade, there can be ...
Benzing A - - 1997
BACKGROUND: Inhaled nitric oxide (NO), a selective pulmonary vasodilator, reduces pulmonary artery pressure in patients with acute respiratory distress syndrome (ARDS). In spite of the reduction of right ventricular afterload, the effect of NO on cardiac output remains unclear. METHODS: A patient with ARDS and echocardiographically determined severe acute right ...
Kööbi T - - 1997
OBJECTIVE: To evaluate the reliability of whole-body impedance cardiography with electrodes on wrists and ankles in the measurement of cardiac output compared with the thermodilution method. DESIGN: Prospective, clinical investigation. SETTING: Surgical intensive care unit and operating room at a university hospital. PATIENTS: Simultaneous cardiac output measurements by thermodilution and ...
Book Wendy - - 1997
Cardiac tamponade is a well recognized complication of acute proximal aortic dissection and is almost uniformly fatal if not immediately diagnosed and surgically treated. Pericardiocentesis has an ill-defined and perhaps deleterious role in the management of this condition. Severe concentric left ventricular hypertrophy and intravascular volume depletion may further impede ...
Kresh J Y - - 1997
In the past the study of mechanical and electrical properties of the heart has been disjointed with minimal overlap and unification. The fact remains that these features are tightly coupled and central to the functioning heart. The maintenance of adequate cardiac output relies upon the highly integrated autoregulatory mechanisms and ...
Bando K - - 1997
BACKGROUND: Poor pulmonary reserve is a risk factor that is used to exclude some patients from major operations. However, the value of routine spirometry in patients undergoing cardiac operations has not been widely evaluated. METHODS: The outcomes of 586 consecutive adult patients undergoing cardiac operations were reviewed retrospectively to assess ...
Nagano R - - 1997
In treating patients with acute hypertensive heart failure we often try preload-reduction therapy using diuretics or vasodilators, but this may frequently produce a considerable decrease in cardiac output, particularly in hypertensive patients with diastolic dysfunction. Therefore, it is important from the clinical standpoint to predict the change in cardiac output ...
Burchell S A - - 1997
OBJECTIVE: To evaluate the agreement of continuous cardiac output and mixed venous oxygen saturation measurements, obtained with a modified pulmonary artery catheter, with those values obtained by standard intermittent bolus thermodilution and cooximetry. DESIGN: Prospective, clinical investigation. SETTING: A surgical intensive care unit in a tertiary referral center. PATIENTS: Twenty-one ...
D'Cruz Ivan - - 1997
Although echocardiography has been used for diagnosing pericardial effusions since 1965, the grading of such effusions for size, and also the diagnosis of tamponade have depended almost entirely on qualitative observations or "signs." The categorization of pericardial effusions into small, moderate, or large according to the width of pericardial space ...
Dugger B - - 1997
Dopamine is commonly used to improve hemodynamic states caused by myocardial infarction, septicemia, open heart surgery, renal failure, and chronic cardiac decompensation. It works to increase cardiac output and renal perfusion. Peripheral dopamine administration increases the risk for extravasation, vein and tissue damage, and possible disfigurement. This study showed a ...
Boyle M - - 1997
Cardiac output (CO) is a fundamentally important haemodynamic parameter and its continuous measurement has the potential to enable early recognition of haemodynamic trends and earlier therapeutic response. A method of continuous cardiac output (CCO) monitoring is now available for clinical use. The accuracy and reliability of this method has been ...
Miller D M - - 1997
The Maxima is a new breathing system which makes it possible to monitor cardiac output (Q) noninvasively and to follow trends continuously. When used as a rebreathing system in controlled ventilation, the Maxima selectively eliminates alveolar gas and no fresh gas (VF) is eliminated. Without the need for a mixing ...
McAuliffe G - - 1997
PURPOSE: Heart rate is considered to be a major determinant of cardiac output in infants and small children but the relationships between age, heart rate and cardiac output in humans have never been clearly established. This study was designed to determine the change in cardiac output following atropine iv to ...
Giudici M C - - 1997
Cardiac output was measured in 89 patients using transthoracic continuous-wave echo Doppler comparing right ventricular outflow tract pacing with the right ventricular apex at the time of permanent pacemaker implantation. Overall, cardiac output improved 18.8% (p <0.0001) and cardiac index 21.0% (p <0.0001) with outflow tract placement; patients with a ...
Werner H A - - 1997
OBJECTIVE: We reviewed 5 years' experience with peritoneal dialysis in children with acute renal failure after cardiac operations. We hypothesized that peritoneal dialysis is safe and effective in children with low-output cardiac failure after cardiac operations. RESULTS: Mortality in these patients with renal failure (n = 32) was 46.9%. Fluid ...
Eillis M F - - 1997
Patients often experience low cardiac output following cardiac surgery and as many as 90% of patients experience a decreased left ventricular ejection fraction (LVEF) and cardiac index (CI). Causes may vary from volume depletion to global myocardial dysfunction. Critical thinking skills, combined with diligent patient monitoring and a knowledge of ...
Bloch K E - - 1997
Thoracocardiography noninvasively estimates changes in cardiac output by recording ventricular volume curves from an inductive plethysmographic transducer placed around the chest near the xiphoid process. We evaluated performance of thoracocardiography for estimation of cardiac output in 21 critically ill patients in comparison to thermodilution. A total of 201 paired cardiac ...
Schultz S C - - 1997
Spontaneous cardiac tamponade secondary to a congenital coagulation defect has never been reported. We report a case of acute cardiac tamponade in a patient with a known factor V deficiency. This patient presented with classic signs of acute cardiac tamponade and an enlarged cardiac silhouette. After diagnostic two-dimensional echocardiography and ...
Inoue T - - 1997
We describe a 42-year old Japanese woman with mixed connective tissue disease (MCTD) who developed fulminant hepatic failure and hepatic encephalopathy. Massive pericardial effusion accompanying cardiac tamponade was shown by echocardiography. The hepatic failure was considered to be caused by a low cardiac output state because of cardiac tamponade, which ...
Fodden D I - - 1996
OBJECTIVE: To estimate the cardiac output produced by external cardiac compression during standard cardiopulmonary resuscitation performed by two groups of operators with different levels of experience and training. METHODS: Cardiac output was measured by Doppler aortovelography. All patients included in the study had necropsy examinations. Only patients without evidence of ...
Barton E D - - 1996
A 21-year-old male presented to the trauma unit after he was stabbed once with a knife in the left anterior chest. The patient was awake and combative, very intoxicated, with a systolic blood pressure of 90 mmHg by palpation and a heart rate of 110 beats per min. Physical examination ...
Maslow A - - 1996
Doppler ultrasound can be used to measure cardiac output (CO). Intraoperative Doppler cardiac output (DCO) by transesophageal echocardiography (TEE) has been studied using blood flow velocity from the left ventricular outflow tract (LVOT), the mitral valve (MV), and the main pulmonary artery (MPA). The purpose of this study was to ...
Chu P H - - 1996
Intracavitary metastasis causing right ventricular outflow tract (RVOT) obstruction is very rare. Combination of cardiac tamponade with RVOT obstruction due to intracavitary metastasis has never been reported in the literature. Herein, we report a case of colonic carcinoma with sudden onset of severe dyspnea. Echocardiography detected cardiac tamponade as well ...
O'Leary D S - - 1996
The objective of this study was to determine the role of cardiac output in mediating spontaneous fluctuations in mean arterial pressure (MAP) conscious dogs. Dogs were chronically instrumented to monitor MAP and cardiac output. Atrioventricular (AV) block was induced, and left ventricular and right atrial electrodes were implanted. After recovery, ...
Axler O - - 1996
PURPOSE: Recent observations have highlighted errors in the thermodilution technique of measuring cardiac output. Thus, cardiac output measurements using transesophageal echocardiography and the Fick method were compared with simultaneous thermodilution measurements. METHODS: In 13 mechanically ventilated critically ill patients, cardiac output was determined simultaneously using (1) transesophageal echocardiography (COTEE, (2) ...
Chen E Q - - 1996
In addition to providing useful clinical information, cardiac output determined during rubidium-82 positron emission tomographic (PET) myocardial perfusion studies can be used in the measurement of absolute regional myocardial blood flow using Sapirstein's method. This investigation was conducted to compare cardiac output values obtained by post-processing data acquired in a ...
Eisenberg M J - - 1996
OBJECTIVE: This study was designed to determine the diagnostic value of 12-lead ECG for pericardial effusion and cardiac tamponade. DESIGN: Cross-sectional study. SETTING: University hospital. PATIENTS: Hospitalized patients with and without pericardial effusion and cardiac tamponade. MEASUREMENTS AND RESULTS: In a blinded manner, we reviewed 12-lead ECGs from 136 patients ...
Kohl T - - 1996
BACKGROUND: Cardiac procedures in exteriorized fetuses or assisted by fetoscopy require monitoring capabilities not attended by conventional maternal transabdominal echocardiography. METHODS: We, therefore, assessed the potential of fetal transesophageal echocardiography (TEE) utilizing an intravascular ultrasound catheter (IVUC) for fetal cardiac monitoring. We inserted a 10-F-10-MHz IVUC into the esophagus in ...
Hakim J G - - 1996
OBJECTIVE: To determine the prevalence and characteristics of myocardial dysfunction and other cardiac manifestations in acutely ill hospital patients infected with human immunodeficiency virus (HIV) in Zimbabwe. DESIGN: A prospective echocardiographic survey of acutely ill HIV seropositive patients. SETTING: General medical ward, Harare Central Hospital, Zimbabwe. PATIENTS: One hundred and ...
Rao V - - 1996
The purpose of this study was to identify patients at risk for the development of low cardiac output syndrome after coronary artery bypass. Low cardiac output syndrome was defined as the need for postoperative intraaortic balloon pump or inotropic support for longer than 30 minutes in the intensive care unit ...
Shoemaker W C - - 1996
OBJECTIVE: To evaluate the feasibility of multicomponent noninvasive hemodynamic monitoring in critical emergency patients and to compare this technique with simultaneous invasive monitoring by the pulmonary artery thermodilution catheter. METHODS: A prospective observational study was done comparing invasive monitoring and noninvasive monitoring in 60 critically ill or injured patients who ...
Wong K L - - 1996
BACKGROUND: Continuous noninvasive measurement of cardiac output (CO) is clinically desirable. Thoracic electrical bioimpedance (TEB) offers such a continuous noninvasive technique for the measurement of CO on a beat-by-beat basis. The purpose of this study was to compare the correlation of TEB with the thermodilution (TD) method of measuring CO ...
Kaminer S - - 1996
Anomalous origin of the left coronary artery from the pulmonary artery most commonly presents in infancy with clinical features of dilated cardiomyopathy, congestive heart failure or cardiogenic shock as a result of myocardial ischemia. We report the first presentation of this disorder with hemorrhagic pericardial effusion and cardiac tamponade as ...
Lichtenthal P R - - 1996
The safety of a new continuous cardiac output monitoring system, recently introduced by Baxter Healthcare Corporation's Edwards Critical-Care Division, was evaluated in normal sheep. The study compared the biocompatibility and safety of the Vigilance CCO Monitoring System, which employs a continuous cardiac output (CCO) catheter with Baxter Edward's standard Paceport ...
Wippermann C F - - 1996
OBJECTIVE: To compare a system that continuously monitors cardiac output by the Fick principle with measurements by the thermodilution technique in pediatric patients. DESIGN: Prospective direct comparison of the above two techniques. SETTING: Pediatric intensive care unit of a university hospital. PATIENTS: 25 infants and children, aged 1 week to ...
Yim S F - - 1996
A 26-year-old primigravida who presented to us with threatened preterm labour which was suppressed successfully with sulindac, was found to have a pericardial effusion. Pericardiocentesis was performed because of evidence of right ventricular compression. However, it was complicated by inadvertent puncture of the left ventricle causing cardiac tamponade, and hypovolaemic ...
Sakamoto T - - 1996
To manage postcardiotomy patients with cardiopulmonary bypass support (CPS), it is very important to evaluate the native cardiac function. In 5 postcardiotomy cases without CPS, the alternative thermodilution outputs by right ventricular (RV) injection were compared with simultaneous thermodilution outputs by standard right atrial (RA) injection. Cardiac output determined by ...
Choi W W - - 1996
A new automatic cardiac output control algorithm for an implantable electromechanical total artificial heart (TAH) was developed based on the analysis of motor current waveform without using any transducer. The basic control requirements of an artificial heart can be described in terms of three features: preload sensitivity, afterload insensitivity, and ...
Willemsen G H - - 1996
The growing need for more advanced ambulatory monitoring has led to the development of an ambulatory monitor for impedance cardiography (VU-AMD). This paper presents two studies addressing the validity of the VU-AMD. In the first study, the cardiovascular responses of 25 subjects during various conditions were simultaneously recorded with the ...
Descorps-Declere A - - 1996
OBJECTIVE: The aim of this study was to evaluate the accuracy of cardiac output measurement with transesophageal echocardiography (TEE) using a transgastric, pulsed Doppler method in acutely ill patients. DESIGN: Cardiac output was simultaneously measured by thermodilution (TD) and a transgastric, pulsed Doppler method. SETTING: The study was carried out ...
Janvier J J - - 1996
The effects of serotonin on continuously recorded cardiac parameters (heart rate, cardiac output, cardiac stroke volume), ventral and dorsal aortic blood pressures, branchial and systemic vascular resistances were investigated in the European eel in vivo. Intravenous administration of serotonin (30 micrograms.kg-1) caused a marked bradycardia (45%) and a simultaneous decrease ...
Ryuko K - - 1996
A 31-year-old woman developed severe ovarian hyperstimulation syndrome (OHSS) after exogenous gonadotropin stimulation for an in vitro fertilization program. Because of refusal of invasive monitoring, thoracic electrical bioimpedance (TEB) was performed to evaluate cardiac function and volume status. TEB pointed out decreased cardiac output (CO: 4.23 liters/min), cardiac index (CI: ...
Guilbeau J R - - 1996
A thermodilution method of obtaining continuous cardiac outputs represents an improvement in the assessment and treatment of critically ill patients. The critical care nurse assists in placement of the pulmonary artery catheter, which includes a thermal filament for continuous readings of cardiac output, and uses the continuous cardiac output readings ...
Spodick D H - - 1995
Pericardiocentesis is primarily indicated for the management of emergent cardiac tamponade. Insert the needle into the left xiphocostal angle perpendicular to the skin and 3 to 4 mm below the left costal margin (the preferred approach); advance it 5 to 10 mm (or more if necessary) until it reaches the ...
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