External cardiac pressures and the left ventricular pressure-volume relationship
نویسندگان
چکیده
منابع مشابه
Left ventricular pressure-volume relationship in conscious mice.
With the availability of transgenic models, the mouse has become an increasingly important subject for genetic-hemodynamic studies. Recently, we developed a technique to measure left ventricular (LV) pressure in conscious mice with an implanted LV polyethylene tube. We extended our new method by evaluating the LV pressure-volume relationship and examined the feasibility of this method in this s...
متن کاملLeft Ventricular Pressure-Volume Alterations
Left ventricular function, pressure-volume relationships, and wall motion were studied by sequential cineventriculography during acute myocardial ischemia, induced by atrial pacing, in 10 subjects. Observations made in this group were contrasted to data obtained during atnal pacing in a smaller normal group. An acute alteration in the pressure-volume relation occurred in five subjects during is...
متن کاملLeft Ventricular Pressure-Volume Relationships
It has been shown in man that myocardial ischemia, whether precipitated by exercise or pacinginduced tachycardia, is associated with abnormalities of left ventricular end-diastolic pressure. There has been controversy as to whether this relationship is due to decreased myocardial compliance or to an increase in left ventricular volume as a manifestation of left ventricular failure. Simultaneous...
متن کاملLeft Ventricular Pressure-Volume Alterations
Left ventricular function, pressure-volume relationships, and wall motion were studied by sequential cineventriculography during acute myocardial ischemia, induced by atrial pacing, in 10 subjects. Observations made in this group were contrasted to data obtained during atnal pacing in a smaller normal group. An acute alteration in the pressure-volume relation occurred in five subjects during is...
متن کاملDynamic left ventricular elastance: a model for integrating cardiac muscle contraction into ventricular pressure-volume relationships.
To integrate myocardial contractile processes into left ventricular (LV) function, a mathematical model was built. Muscle fiber force was set equal to the product of stiffness and elastic distortion of stiffness elements, i.e., force-bearing cross bridges (XB). Stiffness dynamics arose from recruitment of XB according to the kinetics of myofilament activation and fiber-length changes. Elastic d...
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ژورنال
عنوان ژورنال: Critical Care
سال: 1999
ISSN: 1364-8535
DOI: 10.1186/cc512