Morphogenesis of postresection of cor pulmonale

Authors

  • O. B. Slabyy I. Horbachevsky Ternopil State Medical University

DOI:

https://doi.org/10.11603/2414-4533.2017.3.8130

Keywords:

lung resection, postresection arterial pulmonary hypertension, pulmonary heart disease.

Abstract

Development of pulmonary heart disease produces a number of compensatory and adaptive processes in all body structures that play an important role in decompensation of this disorder. Various physiological processes that unfold during this process can be objectively evaluated with the help of morphometry, which allows visualizing the results of morphology studies, sequentially interpret morphogenesis mechanisms in the damaged organs, and determine adaptive reserves and capability for corrective response. Irreversible pathological processes in the pulmonary tissue are a cause of resection of the lungs. It is one of the most traumatic surgical interventions, frequently accompanied by complications due to the sudden increase in pulmonary blood pressure caused by decrease in its volume. Insufficient deployment of adaptive and compensatory resources by the myocardium can cause acute right ventricular heart failure or acute pulmonary heart disease. Removal of more than one third of pulmonary tissue may lead to the development of a number of disorders. Among them there is a right ventricular hyperdynamic syndrome; dilatation at the stage of decompensation of the chronic pulmonary heart; arterial hypertension in the pulmonary circle; and pulmonary heart disease, which is characterized by increased mass and enlarged chambers of the heart with dominating hypertrophy and dilatation of the right ventricle and right atrium,
thickening of arterial walls, narrowing of arterial lumen, decrease in the flow capability, increased number of damaged endothelial cells, reactive hyperaemia the capillary venules and venules, deterioration of secretory activity of the atrium myoendocrine cells, dystrophy, necrobiosis of cardiomyocytes, endothelial cells, and stromal structures, infiltrative and sclerotic processes. This study utilized morphometry to show that long-term effects of right-sided pulmonectomy in Vietnamese breed pigs and laboratory white male rats result in a pronounced remodeling of heart chambers characterized by unbalanced, disproportional growth their mass and expansion of the chambers. Additionally, in post-surgical period, the pulmonary heart reveals marked structural reorganization of predominantly small arteries of the ventricles and atrium, and expressed remodeling of microhemocirculatory vessels of the heart ventricles and atrium. As decompensation of hypertrophied heart occurs, the secretory activity of myoendocrinocytes decreases. The stages of hypertrophied myocardial morphogenesis, such as compensated and decompensated pulmonary heart, can be characterized using cardiometric parameters. The most informative are the indicators that highlight imbalance and disproportionality of hypertrophic and hyperplastic processes on all structural levels of the heart muscle.

Author Biography

O. B. Slabyy, I. Horbachevsky Ternopil State Medical University

проректор з науково-педагогічної роботи та соцiальних
питань

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Published

2017-11-08

How to Cite

Slabyy, O. B. (2017). Morphogenesis of postresection of cor pulmonale. Hospital Surgery. Journal Named by L.Ya. Kovalchuk, (3), 109–113. https://doi.org/10.11603/2414-4533.2017.3.8130

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