Effects of Cardioprotective Tactics on the Myocardial Perfusion and Contractile Function of the Left Ventricular Myocardium in Cancer Patients with Evidence of Doxorubicin-Induced Cardiotoxicity.

Abstract

Aim\xa0\xa0\xa0\xa0\xa0 To study the effect of cardioprotective tactics on parameters of left ventricular myocardial perfusion and contractility as per data from single-photon emission computed tomography in oncological patients with signs of anthracycline-induced cardiotoxicity.Material and methods\xa0 The study included patients with oncological diseases (n=61) referred to polychemotherapy (PCT). For patients with signs of anthracycline-induced cardiotoxicity, a cardioprotective tactics was used, which included changing the PCT schedule and administering beta-blockers and angiotensin-converting enzyme inhibitors. For all patients at baseline, after the first four PCH courses, after initiation of the cardioprotective tactics and the next four PTC courses, the level of N-terminal pro-brain natriuretic peptide was measured and echocardiography and perfusion single-photon emission computed tomography were performed with assessment of left ventricular (LV) perfusion heterogeneity, systolic and diastolic function.Results Following four PTC courses, signs of cardiotoxicity were detected in 13 (21.3\u200a%) patients. On the background of the cardioprotective tactics, a further decrease in LV ejection fraction (EF) by -9±2\u200a% (p<0.01) was observed in 4 (30.8\u200a%) patients. In 9 (69.2\u200a%) patients, LV EF increased by 4±2\u200a% (p<0.01). Standard indexes of LV myocardial perfusion did not significantly change. In 7 patients, the cardioprotective tactics was associated with reduced severity of myocardial perfusion disorder, LV∆σТ\u2009=\u2009-1.37±1.29 (p<0.05), and in 4 patients, with reduced heterogeneity of myocardial perfusion, LV∆σН\u2009= -1.20±0.70 (p<0.05).Conclusion\xa0\xa0\xa0\xa0\xa0 The cardioprotective tactics prevents both further disorder of perfusion and decreases in parameters of left ventricular myocardial contractility in patients with anthracycline-induced cardiotoxicity.