Search Results
Results 401 - 450 of 991
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Mazzoni V - - 2000
BACKGROUND: The aim of this study was to assess the prevalence of pericardial effusion in acute myocardial infarction and the different prognosis associated with distinct patterns of pericardial effusion (anechoic/hypoechoic vs hyperechoic effusion). METHODS: Five hundred eighty-five consecutive patients admitted to the Coronary Care Unit for acute myocardial infarction were ...
Prielipp R C - - 2000
OBJECTIVE: Pulse oximetry (SpO2) is the non-invasive standard for monitoring arterial oxygen saturation in patients undergoing anesthesia, but is subject to external interference by motion artifact, peripheral vasoconstriction, and low cardiac output. We hypothesized that oximetry signals could be acquired from the esophagus when peripheral pulse oximetry is unobtainable. Therefore, ...
Neto E P - - 1999
OBJECTIVE: To compare semicontinuous cardiac output (CCO) with bolus cardiac output (BCO), in the immediate postoperative period after valvular surgery, under hypothermic cardiopulmonary bypass with two CCO pulmonary artery catheters, based on the pulsed warm thermodilution technique, i.e., Opti-Q from Abbott or IntelliCath from Baxter-Edwards (Abbott and Baxter groups, respectively). ...
Royse C F - - 1999
This study assessed the agreement between three methods of cardiac output (CO) measurement, thermodilution, the current clinical standard, and two transoesophageal echocardiographic techniques. Measurements were performed in 37 patients using thermodilution, continuous wave Doppler across the aortic valve and pulsed wave Doppler positioned in the left ventricular outflow tract. The ...
Stepien R L - - 1999
Right lateral, left lateral and ventrodorsal radiographs were obtained in 20 normal ferrets (11 male). Three independent observers recorded measurements of the cardiac silhouette and results for each parameter were averaged. Long axis (length), short axis (width) and total of length plus width (L+W) were recorded in each view. Comparative ...
Kööbi T - - 1999
OBJECTIVE: To evaluate the reliability of whole-body impedance cardiography in the measurement of cardiac output after coronary artery bypass grafting operation in comparison with the thermodilution method. DESIGN: Prospective, consecutive sampling. PATIENTS: A total of 82 patients undergoing coronary artery bypass surgery were investigated. In a group of 41 patients ...
Mercé J - - 1999
BACKGROUND: Clinical data are of unquestionable value for management purposes in cardiac tamponade, whereas the precise value of Doppler echocardiographic findings is not yet fully understood. We aimed to prospectively assess the correlation between clinical and Doppler echocardiographic signs in the diagnosis of cardiac tamponade in a large series of ...
Velmahos G C - - 1999
Pulmonary artery catheterization is usually not available to critically injured patients before admission to the intensive care unit, where action to correct values derived from such monitoring may be too late. Methods allowing hemodynamic monitoring during the early stages after trauma need to be explored. We used non-invasive monitoring systems ...
Summers R L - - 1999
Differentiation of the central haemodynamic state is often critical during acute resuscitation. A clinical case series is presented in which the use of thoracic electrical bioimpedance (TEB) was pivotal in the diagnostic determination of the pathophysiology. This new technology allows the emergency physician to rapidly determine cardiac output, total peripheral ...
Kuralay E - - 1999
OBJECTIVE: The aim of this prospective study was to evaluate the effectiveness of posterior pericardiotomy from the point of pericardial effusion related with supraventricular tachycardia and development of delayed posterior cardiac effusions. Materials and methods: This prospective randomized study was carried out in 200 patients undergoing coronary artery bypass surgery ...
Hoeper M M - - 1999
Assessment of cardiac output is an important part of the management of patients with pulmonary hypertension. The accuracy of the thermodilution technique in patients with low cardiac output or severe tricuspid regurgitation has been questioned. To address this issue, we simultaneously compared 105 cardiac output measurements by the Fick method ...
Jaffe M B - - 1999
The partial rebreathing method of cardiac output estimation is reviewed with a particular focus on its application for continuous monitoring, rebreathing and implementations and from both a historical and technical perspective. The assumptions of the method are discussed as well as the various implementations. The NICO monitor and rebreathing valve ...
Buhre W - - 1999
OBJECTIVE: To investigate the precision and accuracy of continuous pulse contour cardiac output (PCCO) compared with intermittent transcardiopulmonary (TCPCO) and pulmonary artery thermodilution (TDCO) measurements in patients undergoing minimally invasive coronary bypass surgery (MIDCAB). DESIGN: Prospective, controlled, clinical study. SETTING: University hospital. PARTICIPANTS: Twelve patients undergoing MIDCAB. INTERVENTIONS: Thirty-six measurements ...
Tsang T S - - 1999
Cardiac tamponade is a life-threatening condition. Accurate diagnosis and prompt intervention are necessary. Classically, clinical features of tamponade include pulsus paradoxus, tachycardia, increased jugular venous pressure, and hypotension. With the advent of echocardiography, confirmation of an effusion and accurate assessment of its hemodynamic impact can be achieved, frequently in the ...
Pascoe J R - - 1999
Eight horses were fitted surgically with 8 ultrasonic sonomicrometer crystals each attached to their left ventricular pericardia and a left atrial catheter. Three horses returned to treadmill performance with a maximum rate of oxygen consumption similar to their presurgical values. These horses were evaluated to determine how well sonomicrometer estimates ...
Snyder R W - - 1999
Bacterial pericarditis with cardiac tamponade is a life-threatening disorder that has been associated with a variety of organisms. There is usually an associated underlying condition or a seeding of the pericardium from an infection elsewhere. We report the development of cardiac tamponade and a subsequent pericardial constriction due to group ...
Palacios IF - - 1999
Pericardial effusion may occur as a result of a variety of clinical conditions, including viral, bacterial, or fungal infections and inflammatory, postinflammatory, autoreactive, and neoplastic processes. More common causes of pericardial effusion and tamponade include malignancy, renal failure, viral and bacterial infectious processes, radiation, aortic dissection, and hypothyroidism. It can ...
Belzberg H - - 1999
Preoperative preparation of the cardiac patient is based on matching the cardiac reserve to the blood flow demands imposed by surgical stress and the underlying disease state. Evaluation must include functional assessment of any coronary artery disease or other organic cardiac disease that may place myocardial tissue at risk of ...
Jellema W T - - 1999
BACKGROUND: To compare continuous cardiac output obtained by simulation of an aortic input impedance model to bolus injection thermodilution (TDCO) in critically ill patients with septic shock. METHODS: In an open study, mechanically ventilated patients with septic shock were monitored for 1 (32 patients), 2 (15 patients), or 3 (5 ...
Pesce C - - 1999
Central venous catheterization is a reliable technique in neonatal surgery. Nevertheless, the rate of mechanical catheter-related complications remains high. We report a neonate with gastroschisis in which the successful placement of a central venous catheter was followed later by a cardiac tamponade with a fatal outcome. This complication occurred without ...
Cook M A - - 1999
Secondary neoplastic involvement of the heart is common but usually asymptomatic. Malignancy rarely presents as acute pericarditis, cardiac tamponade, and myocardial infarction in the same patient. We report a patient with unsuspected metastatic pancreatic adenocarcinoma who presented with acute pericarditis and cardiac tamponade and subsequently developed a myocardial infarction due ...
Dalrymple-Hay M J - - 1999
OBJECTIVE: Following corrective cardiac surgery in infants and children for congenital heart disease, a persistent low cardiac output refractory to conventional modes of treatment is associated with a mortality approaching 100%. We advocate the use of whole body hypothermia to reduce tissue oxygen demand and provide a degree of cellular ...
Crystal E - - 1999
AIMS: To compare empirically programmed and cardiac output-based programming of atrioventricular (AV) interval in patients with dual chamber pacemakers. METHODS AND RESULTS: In 19 patients with implanted dual chamber pacemakers due to AV block but otherwise normal hearts, cardiac output was assessed using an impedance cardiography device. In all patients, ...
Tutar H E - - 1999
A 12-year-old girl presented with recurrent pericardial effusion due to firearm pellet injury to the left ventricle. The pellet was localized by two-dimensional echocardiography within the left ventricular apical wall. Since the patient was asymptomatic, left ventriculotomy was avoided to extract the pellet and only pericardial tube drainage was carried ...
Zimmer H G - - 1999
The basic instruments for measuring functional cardiovascular parameters and the most important discoveries made by Carl Ludwig and his disciples in cardiovascular physiology are described and put into perspective in regard to the further development of his methods and ideas. The most important apparatus was the kymograph, which, for the ...
McCloy K - - 1999
OBJECTIVE: To determine the effect of 5-mL injectate on cardiac output measurements in critically ill patients with low ventricular ejection fraction (< 35%). METHODS: Thermodilution cardiac output measurements obtained with three 5-mL and three 10-mL (randomly ordered) iced injectates in 50 patients with low ejection fraction were averaged if the ...
Kuvin J T - - 1999
A 37-year-old woman was evaluated for signs and symptoms of cardiac tamponade 11 days after mitral valve replacement and tricuspid valve repair. The transthoracic echocardiogram showed a large, compartmentalized pericardial effusion that resulted in left ventricular apical diastolic collapse. Also noted were right ventricular posterior wall diastolic collapse and hemodynamic ...
Zöllner C - - 1999
OBJECTIVE: To evaluate the accuracy of a new continuous cardiac output monitor in critically ill patients. DESIGN: Criterion standard study. SETTING: Cardiac surgery intensive care unit in a university hospital. PATIENTS: Twenty cardiac surgical patients requiring intensive care treatment with pulmonary artery catheters after surgery. INTERVENTIONS: None. MEASUREMENTS AND MAIN ...
Kööbi T - - 1999
This review deals with recent developments in non-invasive cardiac output measurement. In the past few years significant progress has been made with semi-invasive transoesophageal echocardiography; the method now provides advanced facilities to measure cardiac output and other important characteristics of cardiac function. The method is, however, operator-dependent and the equipment ...
Baillard C - - 1999
Ten critically ill patients underwent this prospective study to assess the reliability of the continuous thermodilution versus transoesophageal Doppler techniques in the determination of continuous cardiac output (CO) and systemic vascular resistance (SVR). A total of 145 pairs of CO and SVR measurements were obtained by both a pulmonary artery ...
Albert N M - - 1999
BACKGROUND: The reliability of cardiac output obtained with the bolus technique is a problem. OBJECTIVES: To compare measurements of cardiac output measured with bolus and continuous techniques in patients with low cardiac output and to determine if measurements obtained with the continuous technique increased the number of subsequent clinical decisions. ...
Zácek P - - 1999
Thoracic electrical bioimpedance cardiography is a non-invasive, continuous and low-cost method of estimation of cardiac output and other haemodynamic parameters. Though subject to continuous technological refinement controversial opinions exist on its validity in subsets of critically ill patients, patients with heart disease or after cardiac surgery. A comparison study between ...
Steinberger J - - 1999
Pulmonary valvar stenosis with intact ventricular septum is a common anomaly. This lesion poses a fixed obstruction to the right ventricular outflow. The right ventricle ejects the entire cardiac output across the stenotic valve. Right ventricular systolic pressure and oxygen demand are increased at rest and more so with exercise. ...
Sunday R - - 1999
Neoplastic involvement of the pericardium resulting in an effusion and subsequent tamponade is an emergency requiring prompt decompression, generally safely accomplished by subxiphoid pericardiectomy. However, the current case report describes a patient with florid pericardial tamponade who underwent surgical decompression with transient hemodynamic improvement, who then rapidly developed progressive, heart ...
Verrier R L - - 1998
BACKGROUND: A nonsurgical means to access the normal pericardial space could provide opportunities for diagnostic sampling and therapeutic interventions. Because there are currently no approved nonsurgical methods to accomplish this, we tested a new approach in large animals. METHODS AND RESULTS: A catheter system was employed in a percutaneous approach ...
Forster M R - - 1998
We report on a case of a 43-year-old man who developed reversible myocardial depression and pericarditis related to severe sepsis secondary to rectosigmoid colonic perforation. The management of this patient was aided by the use of a continuous thermodilution cardiac output catheter and monitor, recently introduced in clinical practice.
Kasravi B - - 1998
To develop a safe, noninvasive, simple, inexpensive, and clinically adaptable method for estimating cardiac output, we evaluated the potential of lung to finger circulation time (LFCT) and buildup time (Tb) of oxygen as measured by pulse oximetry to estimate cardiac output. Significant correlation was found between cardiac output as measured ...
Rennotte M T - - 1998
The multiple inert gas elimination technique (MIGET) is being increasingly used in respiratory physiology and pathophysiology. Six inert gases are given as an intravenous infusion then measured in samples of expired air and mixed arterial and venous blood. This requires right-sided catheterization, a procedure that is sometimes ethically inappropriate. The ...
Hendrickx J F - - 1998
Sevoflurane uptake (Vsevo) can be predicted by the square root of time model or the four-compartment model. However, Vsevo and the effect of cardiac output on anaesthetic uptake have not been quantified clinically. After obtaining IRB approval and informed consent, 34 adult patients received closed-circuit anaesthesia with sevoflurane for 1 ...
Yamakage M - - 1998
PURPOSE: Although thromboelastography is useful for measuring both coagulability and fibrinolysis, it takes about two hours to measure all parameters including fibrinolytic rate. The present study aimed to investigate the usefulness of celite-activated thromboelastography (TEGc) to evaluate fibrinolytic status in non-cardiac surgery. METHODS: Whole blood samples were obtained from 30 ...
Kislukhin V - - 1998
In complex therapy of acute or chronic cardiac failure, the use of valve-free centrifugal pumps or artificial heart ventricles takes place. In these cases, simultaneous monitoring of cardiac and pump performance is very important. In this study, an ultrasound dilution method based on the registration of two dilution curves after ...
Gawlinski A - - 1998
BACKGROUND: Nursing care of patients with advanced heart failure with low ejection fraction requires strict management of IV fluids. Measurement of mixed venous oxygen saturation offers advantages over measurement of cardiac output because no administration of fluid is required and data are obtained continuously. OBJECTIVES: To determine the relationship between ...
Burfeind W R WR - - 1998
OBJECTIVE: Mechanical cardiac stabilization is beneficial for precise coronary anastomoses on the beating heart. However, the effect of mechanical cardiac stabilization on hemodynamics, left ventricular performance, and the degree of injury to underlying tissue are uncertain. METHODS: Twelve swine (20-30 kg) underwent median sternotomy and a mechanical stabilizing device (United ...
Dulai G - - 1998
For the last two decades, peritoneovenous shunts (PVS) have commonly been used in the management of refractory ascites. However, these devices are associated with a wide variety of complications. We report a case of cardiac tamponade due to ventricular perforation by a PVS. Given the substantial morbidity associated with PVS, ...
Mihm F G - - 1998
OBJECTIVE: To validate a new system of continuous cardiac output monitoring. DESIGN: Multicenter, prospective, nonrandomized clinical study. SETTING: Four university hospitals. PATIENTS: Forty-seven adult intensive care unit patients. INTERVENTIONS: Pulmonary artery catheterization. MEASUREMENTS AND MAIN RESULTS: Continuous and bolus cardiac output measurements were obtained over 72 hrs. The 327 continuous ...
Kikura M - - 1998
BACKGROUND: The aim of this study was to evaluate the efficacy of 1.5 mg/kg bolus of amrinone on low cardiac output (CO) state following emergence from cardiopulmonary bypass (CPB) in cardiac surgical patients. METHODS: Immediately after emergency from CPB, 14 patients with a cardiac index (CI) less than 2.2 l.min-1.m-2 ...
Collier P E - - 1998
BACKGROUND: This retrospective study was undertaken to determine the mechanism by which cardiac tamponade (CT) occurs after placement of central venous catheters (CVC), and to determine if physicians are aware of this potentially lethal complication. MATERIALS AND METHODS: Twenty-five previously unreported cases of CT from CVC were reviewed. The chest ...
Cohen A J - - 1998
OBJECTIVE: A new device, using whole body bioresistance measurements and a new equation for calculating stroke volume has been developed. Using this equation, an attempt was made to correlate whole body bioresistance cardiac output with thermodilution cardiac output in patients undergoing coronary artery bypass grafting. METHODS: Thirty-one adults undergoing elective ...
Herzog E - - 1998
Pericardial effusion is a common disorder associated with a variety of medical disorders. Diagnostic methods of choice include echocardiography, CT, and MRI. However, diagnosing pericardial effusion with radionuclides is uncommon. A pericardial effusion under pressure may result in tamponade and hemodynamic compromise, which constitutes a cardiac emergency, necessitating emergency intervention ...
Edner M - - 1998
In the Cooperative New Scandinavian Enalapril Survival Study (CONSENSUS II), in which enalapril treatment was initiated intravenously within 24 h after acute myocardial infarction, there was a neutral effect on 6-month mortality, whereas a beneficial effect on the progression of congestive heart failure was noted. We studied the effect of ...
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