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June 1, 2002AJP Heart and Circulatory Physiology

Systolic myocardial stiffness was significantly greater in TAC mice compared with control mice (3,156 +/- 1,433 vs. 1,435 +/- 467 g/cm2, P < 0.01).

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Why the study?

Does pressure overload hypertrophy induced by transverse aortic constriction alter myocardial stress-strain relations and systolic/diastolic function in mice?

Population

Normal mice and mice with pressure overload hypertrophy induced by 7 days of transverse aortic constriction

Comparison

Transverse aortic constriction (TAC) for 7 days vs Normal control mice

Design

Preclinical

Follow-up

7 days

Authors

HTHideyuki TakaokaGEGiovanni EspositoLMLan Mao

Discussion

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Overview

Increased systolic stiffness in murine TAC supports early compensatory hypertrophy; hypothesis-generating for human pressure-overload translation.

Structured PICO

Does pressure overload hypertrophy induced by transverse aortic constriction alter myocardial stress-strain relations and systolic/diastolic function in mice?

P
Population
Normal mice (n=7) and mice with pressure overload hypertrophy induced by 7 days of transverse aortic constriction (n=13)
I
Intervention
Transverse aortic constriction (TAC) for 7 days
C
Comparator
Normal control mice
O
Outcome
Systolic myocardial stiffness (myocardial stress-strain relations)surrogate

In a murine model, early pressure overload cardiac hypertrophy is associated with a heightened contractile state but abnormal diastolic properties, suggesting an early compensatory response.

Cite This Study

Takaoka et al. (2002) studied this question.

synapsesocial.com/papers/6a71e374e5469ee92be22e0fhttps://doi.org/10.1152/ajpheart.00759.2001
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Improved Systolic Ventricular Function With Normal Myocardial Mechanics in Compensated Cardiac Hypertrophy2004 · 45 citations
  2. 2Hyperfunction with normal inotropic state of the hypertrophied left ventricle1977 · 96 citations
  3. 3Genetic Alterations That Inhibit In Vivo Pressure-Overload Hypertrophy Prevent Cardiac Dysfunction Despite Increased Wall Stress2002 · 379 citations
  4. 4Mechanical regulation of myocardial growth during volume-overload hypertrophy in the rat1997 · 45 citations
  5. 5Increased passive stiffness of short-term pressure-overload hypertrophied myocardium in cat1979 · 15 citations