The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Luis Sanchezharguindey - One of the best experts on this subject based on the ideXlab platform.
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cardiac tamponade with the absence of a Paradoxical Pulse the practical utility of echocardiography
Revista Espanola De Cardiologia, 1995Co-Authors: J Zamorano, I Vilacosta, Carlos Almeria, Luis Javier Alonso, Elena Batlle, A Conde, Juan Antonio Castillo, Luis SanchezharguindeyAbstract:: A patient with cardiac tamponade but without hypotension and pulsus paradoxus is reported. In this patient, echocardiography confirmed the diagnosis of cardiac tamponade, showing diastolic collapse of the right ventricle and also the presence of an atrial septal defect (ostium secundum) that explains the absence of pulsus paradoxus. The role of echocardiography in those rare clinical situations that in the presence of cardiac tamponade showed no pulsus paradoxus are discussed.
J S Rankin - One of the best experts on this subject based on the ideXlab platform.
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physiology of cardiac tamponade and Paradoxical Pulse in conscious dogs
American Journal of Physiology-heart and Circulatory Physiology, 1993Co-Authors: M A Savitt, G S Tyson, J R Elbeery, C H Owen, J W Davis, Michael P Feneley, Donald D Glower, J S RankinAbstract:The physiological mechanism of Paradoxical Pulse in cardiac tamponade remains controversial. In eight conscious dogs with intact pericardia, ultrasonic dimension transducers assessed biventricular geometry and volumes, while micromanometers measured right ventricular (RV), left ventricular (LV), pleural, and pericardial pressures. With normal inspiration, peak LV pressure fell by 7.7 +/- 1.3 mmHg at control and by 20.3 +/- 3.7 mmHg during tamponade (P < 0.001), consistent with the development of Paradoxical Pulse. At peak inspiration during tamponade, RV filling increased, the interventricular septum shifted leftward, transeptal pressure became negative, and LV septal arc length (l theta) became smaller than its respective unpreloaded value at maximal vena caval occlusion (l(o)). Analysis of stroke work (SW)-end-diastolic volume (EDV) and end-systolic pressure-volume coordinates at peak inspiration during tamponade revealed that end-systolic pressure was 19.1 +/- 10.2 mmHg below the baseline end-systolic pressure-volume curve (P < 0.01), and SW was 24.2 +/- 8.8% below the baseline SW-EDV curve (P < 0.01), indicating transient inspiratory LV dysfunction. It is proposed that inspiratory leftward interventricular septal shifting at low LV EDV during tamponade completely unloads the septum (l theta < l o), eliminates the septal contribution to global LV SW, results in transient inspiratory LV dysfunction, and contributes to the phenomenon of Paradoxical Pulse.
J Zamorano - One of the best experts on this subject based on the ideXlab platform.
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cardiac tamponade with the absence of a Paradoxical Pulse the practical utility of echocardiography
Revista Espanola De Cardiologia, 1995Co-Authors: J Zamorano, I Vilacosta, Carlos Almeria, Luis Javier Alonso, Elena Batlle, A Conde, Juan Antonio Castillo, Luis SanchezharguindeyAbstract:: A patient with cardiac tamponade but without hypotension and pulsus paradoxus is reported. In this patient, echocardiography confirmed the diagnosis of cardiac tamponade, showing diastolic collapse of the right ventricle and also the presence of an atrial septal defect (ostium secundum) that explains the absence of pulsus paradoxus. The role of echocardiography in those rare clinical situations that in the presence of cardiac tamponade showed no pulsus paradoxus are discussed.
Edgar Navarro Lechuga - One of the best experts on this subject based on the ideXlab platform.
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comparison between peak expiratory flow Paradoxical Pulse and oxihemoglobin saturation as index of severity of asthma exacerbation
Revista Salud Uninorte, 2008Co-Authors: Arcelio Blanco U Nunez, Juan Arturo Mendez Barraza, Edgar Navarro LechugaAbstract:1 Internista neumologo. Coordinador del Servicio de Urgencias, Hospital Universidad del Norte. Correspondencia: Hospital Universidad del Norte, calle 30 (al lado del parque Muvdi). Soledad Atlantico (Colombia). ablanco@uninorte.edu.c 2 Medico en Servicio Social Obligatorio, Hospital Universidad del Norte. 3 Medico. Docente del Departamento de Salud Publica, Universidad del Norte. Barranquilla (Colombia) Vol. 24, N° 1, 2008 ISSN 0120-5552 Resumen
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comparacion del flujo espiratorio pico pulso paradojico y la saturacion de oxigeno de la hemoglobina como indicadores de severidad durante los episodios de crisis asmatica comparison between peak expiratory flow Paradoxical Pulse and oxihemoglobin sa
2008Co-Authors: Arcelio Blanco U Nunez, Juan Arturo Mendez Barraza, Edgar Navarro LechugaAbstract:ResumenObjetivo: Establecer la correlacion entre las crisis asmaticas clasificadas clinicamente y las variables, flujo espiratorio pico, pulso paradojico y saturacion de oxigeno, para definir cual de estas variables es mas confiable como medicion de la severidad de la crisis.Materiales y metodos: Estudio descriptivo evaluativo. Se analizo un total de 395 eventos en pacientes entre los 14 y 86 anos, entre julio 2005 y diciembre de 2006 en la urgencia del Hospital Universidad del Norte, y se obtuvo informacion acerca de datos clinicos y epidemiologicos.Resultados: El 26.8% ocurrio en hombres y el 73.2% en mujeres. Las crisis fueron clasi-ficadas como leves en el 46.68%, moderadas en el 44.38%, severa 7.90% y como paro respiratorio inminente en 1.02%. Conclusion: Este estudio muestra divergencias entre el cuadro clinico y la graduacion de severidad establecida por el flujo espiratorio pico, y se observo que esta medicion tiende a sobredimensionar la severidad de la crisis. La saturacion de hemoglobina puede identificar las crisis severas, pero no establece diferencias significativas entre las crisis leves y moderadas. El pulso paradojico resulto ser la variable objetiva que mas se acoplo.Palabras claves: crisis asmatica, pulso paradojico, flujo espiratorio pico.
M A Savitt - One of the best experts on this subject based on the ideXlab platform.
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physiology of cardiac tamponade and Paradoxical Pulse in conscious dogs
American Journal of Physiology-heart and Circulatory Physiology, 1993Co-Authors: M A Savitt, G S Tyson, J R Elbeery, C H Owen, J W Davis, Michael P Feneley, Donald D Glower, J S RankinAbstract:The physiological mechanism of Paradoxical Pulse in cardiac tamponade remains controversial. In eight conscious dogs with intact pericardia, ultrasonic dimension transducers assessed biventricular geometry and volumes, while micromanometers measured right ventricular (RV), left ventricular (LV), pleural, and pericardial pressures. With normal inspiration, peak LV pressure fell by 7.7 +/- 1.3 mmHg at control and by 20.3 +/- 3.7 mmHg during tamponade (P < 0.001), consistent with the development of Paradoxical Pulse. At peak inspiration during tamponade, RV filling increased, the interventricular septum shifted leftward, transeptal pressure became negative, and LV septal arc length (l theta) became smaller than its respective unpreloaded value at maximal vena caval occlusion (l(o)). Analysis of stroke work (SW)-end-diastolic volume (EDV) and end-systolic pressure-volume coordinates at peak inspiration during tamponade revealed that end-systolic pressure was 19.1 +/- 10.2 mmHg below the baseline end-systolic pressure-volume curve (P < 0.01), and SW was 24.2 +/- 8.8% below the baseline SW-EDV curve (P < 0.01), indicating transient inspiratory LV dysfunction. It is proposed that inspiratory leftward interventricular septal shifting at low LV EDV during tamponade completely unloads the septum (l theta < l o), eliminates the septal contribution to global LV SW, results in transient inspiratory LV dysfunction, and contributes to the phenomenon of Paradoxical Pulse.
