Key result
Pressure overload in human atria induced a significant redistribution of myosin isozymes, with an increase in ventricular-type myosin (HCβ) that correlated strongly with mean atrial pressure (r = 0.78, P<0.01).
Why the study?
Does pressure overload induce changes in the distribution of myosin heavy chain isozymes in human atrial myocardium?
Population
Normal and pressure-overloaded human hearts (atria and ventricles)
Comparison
Immunohistochemical staining with monoclonal… vs Normal human hearts vs. pressure-overloaded…
Design
Preclinical
Authors
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May support adaptive atrial remodeling in pressure overload; leaves open functional or arrhythmic consequences.
Observational (n=23)
Yes
Does pressure overload induce changes in the distribution of myosin heavy chain isozymes in human atrial myocardium?
Effect estimate: r = 0.78
p-value: p=<0.01
Pressure overload in human atria induces a redistribution of myosin heavy chain isoforms, demonstrating an adaptive isozymic shift at the myocardial level.
Tsuchimochi et al. (1984) conducted an observational in Pressure overload (valvular heart disease) (n=23). Pressure overload vs. Normal human atria (without heart disease) was evaluated on Correlation of ventricular-type myosin heavy chain (HCβ) increment with mean atrial pressure (r = 0.78, p=<0.01). Pressure overload in human atria induced a significant redistribution of myosin isozymes, with an increase in ventricular-type myosin (HCβ) that correlated strongly with mean atrial pressure (r = 0.78, P<0.01).
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