scholarly journals Computing of Right Ventricle Volume using Orthogonal Contours

2011 ◽  
Vol 115 (9) ◽  
Author(s):  
A. Usinskas ◽  
M. Paulinas ◽  
M. Meilunas ◽  
M. Mataciunas ◽  
D. Zakarkaite ◽  
...  
Keyword(s):  
Right Ventricle ◽  
Ventricle Volume ◽  
Right Ventricle Volume

scholarly journals Late gadolinium enhancement (LGE) progresses with right ventricle volume in children after repair of tetralogy of fallot

2014 ◽  
Vol 3 ◽  
pp. 15-20 ◽  
Author(s):  
Pekka Ylitalo ◽  
Olli M. Pitkänen ◽  
Kirsi Lauerma ◽  
Miia Holmström ◽  
Otto Rahkonen ◽  
...  
Keyword(s):  
Late Gadolinium Enhancement ◽  
Right Ventricle ◽  
Tetralogy Of Fallot ◽  
Gadolinium Enhancement ◽  
Ventricle Volume ◽  
Right Ventricle Volume

Early changes in protein synthesis in epicardial coronary artery of pressure-overloaded heart

1996 ◽  
Vol 270 (2) ◽  
pp. H685-H691 ◽  
Author(s):  
M. Gerova ◽  
O. Pechanova ◽  
V. Stoev ◽  
M. Kittova ◽  
I. Bernatova ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Coronary Artery ◽  
Left Ventricular ◽  
Leucine Incorporation ◽  
Experimental Conditions ◽  
Coronary Wall ◽  
Anesthetized Dogs ◽  
The Difference ◽  
Ventricle Volume ◽  
Right Ventricle Volume

In anesthetized dogs, a 4-h, approximately 30% increase in blood pressure induced by constriction of the abdominal aorta brought about an increase in the total RNA content in the left anterior descending coronary artery (LADCA) and the left ventricular (LV) myocardium (9.05 +/- 1.72 and 11.06 +/- 4.68%, respectively) but not in the left circumflex coronary artery (LCCA). Under the same experimental conditions, [14C]leucine incorporation increased in LADCA and LV myocardium (45.34 +/- 13.54 and 58.07 +/- 11.91%, respectively), but not in LCCA. The data indicate an early shift in protein synthesis in LADCA and simultaneously in the myocardium during a short-term pressor event. The difference in the shift of protein synthesis in the two main branches of the left coronary artery was related to the quantitatively different deformation of the LADCA and LCCA due to different deformation of the underlying myocardium and/or of the annulus fibrosus atrioventricularis during changes in the left or right ventricle volume [M. Gerova, E. Barta, M. Stolarik, and J. Gero, Am. J. Physiol. 262 (Heart Circ. Physiol. 31): H1049-H1053, 1992]. The results support the hypothesis that the deformation and/or rate of deformation of cells in the coronary wall may trigger an increase in protein synthesis. Changes in protein synthesis in the myocardium and LADCA were found to be reversible 2 h after releasing the aortic constriction.

Heterogeneity in geometrical alterations of main branches of left coronary artery induced by increase in ventricle volume

1992 ◽  
Vol 262 (4) ◽  
pp. H1049-H1053
Author(s):  
M. Gerova ◽  
E. Barta ◽  
M. Stolarik ◽  
J. Gero
Keyword(s):  
Coronary Artery ◽  
Right Ventricle ◽  
Proximal Part ◽  
Ventricular Volume ◽  
Segment Length ◽  
Diastolic Filling ◽  
Coronary Resistance ◽  
Ultrasound Technique ◽  
Ventricle Volume ◽  
Ramus Interventricularis Anterior

With the use of ultrasound technique, segment length and diameter of ramus circumflexus (RC) and ramus interventricularis anterior (RIA) in the dog heart, placed in a bath, were monitored under constant pressure. When the left and/or right ventricular volume was increased by 150% of the normal diastolic filling, segment length of RC increased by 2.54 +/- 0.17 and 2.15 +/- 0.06%, respectively, and diameter of RC decreased by 4.72 +/- 0.20% and by 4.60 +/- 0.20%, respectively. The same filling of the left and/or right ventricle induced in the proximal third of RIA an increase in segment length by 11.40 +/- 0.55 and 12.2 +/- 0.42%, respectively, and a decrease in diameter by 9.41 +/- 0.42% and by 10.01 +/- 0.31%, respectively. The latter values of RIA were significantly higher (P less than 0.001) than those registered in RC. The deformations of RIA decreased toward the periphery of the vessel. By the fact that conduit coronary artery tracks instantaneously the increase of the volume of the left and right ventricle, its contribution to the total coronary resistance increases dynamically. With the ventricular volume increased by 150%, the RC contributes to the total coronary resistance by 14% and RIA in the proximal part contributes by 23%, with values significantly higher than control (10%) (Malindzak, G. S. In: The Coronary Artery. London: Croom Helm, 1982, p. 241-267). The results imply a methodical consequence, namely that the diameter of the respective coronary artery is an index of smooth muscle activity only if both perfusion pressure and volume of the heart are maintained constant.

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