Correlation between a mid-ventricular volume segment and global left ventricular volume measured by the conductance catheter. 2001

A B Ericsson, and H Kronander, and E Söderqvist, and J Vaage, and L A Brodin
Department of Thoracic Surgery, Karolinska Hospital, Stockholm, Sweden. Anders.Ericsson@thxkir.ks.se

OBJECTIVE To investigate whether acute volume changes in single volume segments of the left ventricle can be correlated with global volume changes. If so, changes in global volume might be predicted from changes in segmental volumes. METHODS Volume changes were recorded in six pigs in five intraventricular segments, from apex to heart base, using the conductance catheter (at baseline, after 60 min of apical ischaemia, during preload reduction and afterload increase). A computer algorithm was created to calculate the instantaneous absolute difference between the curve shape of global and normalized segmental volume as a percentage of global stroke volume. RESULTS For a mid-cardiac volume segment constituting 34 (14-39)% [median (range)] of global stroke volume, the mean difference over a cardiac cycle was 4 (1-8)% at baseline. Apical ischaemia resulted in apical dyskinesia, but did not influence the mid-cardiac segment. CONCLUSIONS The volume curve from a segment at mid-cardiac level seems to be a good estimator of the global volume curve, thus giving a foundation for estimation of global volume changes from such a segment.

UI MeSH Term Description Entries
D008955 Models, Cardiovascular Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment. Cardiovascular Model,Cardiovascular Models,Model, Cardiovascular
D009200 Myocardial Contraction Contractile activity of the MYOCARDIUM. Heart Contractility,Inotropism, Cardiac,Cardiac Inotropism,Cardiac Inotropisms,Contractilities, Heart,Contractility, Heart,Contraction, Myocardial,Contractions, Myocardial,Heart Contractilities,Inotropisms, Cardiac,Myocardial Contractions
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D002306 Cardiac Volume The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the cardiac cycle. The amount of blood ejected from a ventricle at each beat is STROKE VOLUME. Heart Volume,Cardiac Volumes,Heart Volumes,Volume, Cardiac,Volume, Heart,Volumes, Cardiac,Volumes, Heart
D006328 Cardiac Catheterization Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures. Catheterization, Cardiac,Catheterization, Heart,Heart Catheterization,Cardiac Catheterizations,Catheterizations, Cardiac,Catheterizations, Heart,Heart Catheterizations
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013318 Stroke Volume The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume. Ventricular Ejection Fraction,Ventricular End-Diastolic Volume,Ventricular End-Systolic Volume,Ejection Fraction, Ventricular,Ejection Fractions, Ventricular,End-Diastolic Volume, Ventricular,End-Diastolic Volumes, Ventricular,End-Systolic Volume, Ventricular,End-Systolic Volumes, Ventricular,Fraction, Ventricular Ejection,Fractions, Ventricular Ejection,Stroke Volumes,Ventricular Ejection Fractions,Ventricular End Diastolic Volume,Ventricular End Systolic Volume,Ventricular End-Diastolic Volumes,Ventricular End-Systolic Volumes,Volume, Stroke,Volume, Ventricular End-Diastolic,Volume, Ventricular End-Systolic,Volumes, Stroke,Volumes, Ventricular End-Diastolic,Volumes, Ventricular End-Systolic
D013552 Swine Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA). Phacochoerus,Pigs,Suidae,Warthogs,Wart Hogs,Hog, Wart,Hogs, Wart,Wart Hog
D016277 Ventricular Function, Left The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance. Left Ventricular Function,Function, Left Ventricular,Functions, Left Ventricular,Left Ventricular Functions,Ventricular Functions, Left

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