More is Not Always Better: What Effect Three versus Two Dimensional Diagnostic High Mechanical Index Impulses Have on Tissue Blood Flow Augmentation

ABSTRACT Indicators which freely cross the capillary wall can be used for measurement of tissue blood flow in many different ways. Basically one can distinguish two categories of methods, viz. the ones where the indicator enters the tissue via the inflowing blood and the ones where the indicator is deposited locally in the tissue. The most important methods are briefly described with special emphasis on the theory of blood flow measurement.

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Regional myocardial tissue blood flow during sequential β1 - and β2-adrenergic blockade in cat hearts with acute ischaemia

Scandinavian Journal of Clinical and Laboratory Investigation ◽

10.3109/00365518309168845 ◽

1983 ◽

Vol 43 (8) ◽

pp. 647-655 ◽

Cited By ~ 1

Author(s):

K. Grong ◽

L. Stangeland ◽

J. Lekven

Keyword(s):

Blood Flow ◽

Tissue Blood Flow ◽

Myocardial Tissue ◽

Adrenergic Blockade ◽

Acute Ischaemia

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Temporal averaging of two-dimensional correlation functions for velocity vector imaging of cardiac blood flow

Choonpa Igaku ◽

10.3179/jjmu.jjmu.k.12 ◽

2017 ◽

Vol 44 (3) ◽

pp. 275-285

Author(s):

Hiroki TAKAHASHI ◽

Hideyuki HASEGAWA ◽

Hiroshi KANAI

Keyword(s):

Blood Flow ◽

Correlation Functions ◽

Velocity Vector ◽

Two Dimensional ◽

Cardiac Blood ◽

Velocity Vector Imaging ◽

Temporal Averaging

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Blood flow and high-energy phosphates in microregions of left ventricular subendocardium

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.1981.240.5.h804 ◽

1981 ◽

Vol 240 (5) ◽

pp. H804-H810 ◽

Cited By ~ 1

Author(s):

H. D. Kleinert ◽

H. R. Weiss

Keyword(s):

Blood Flow ◽

Linear Relationship ◽

Tissue Perfusion ◽

High Energy ◽

Left Ventricular ◽

Significant Loss ◽

Tissue Blood Flow ◽

High Energy Phosphates ◽

Tissue Samples ◽

Heterogeneous Distribution

Blood flow and high-energy phosphate (HEP) content were determined simultaneously in multiple microregions of left ventricular subendocardium in 29 normal anesthetized open-chest rabbits by use of a new micromethod to determine whether a direct linear relationship existed between these parameters. Tissue samples weighed 1-2 mg. ATP and creatine phosphate (CP) content were quantitated in quick-frozen hearts by fluorometry at sites where tissue perfusion was measured by H2 clearance by use of bare-tipped platinum electrodes. A series of validation studies were conducted to ensure that 1) no significant damage to the tissue surrounding the electrode occurred during the period of experimentation and 2) no significant loss of biochemical constituents had occurred due to labile processes during freezing or storage of the tissue. Blood flow, ATP, and CP values averaged 79.1 +/- 24.1 (SD) ml.min-1.100 g-1, 4.9 +/- 1.3 mumol/g tissue, and 8.0 +/- 3.0 mumol/g tissue, respectively, and are similar to those reported in studies using larger tissue samples. Correlation between the heterogeneous distribution of tissue perfusion and HEP revealed no direct linear relationship between these parameters in the normal unstressed rabbit subendocardium.

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