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Meeting ReportCardiovascular Track

Effects of bet-blocker therapy on the myocardial sympathetic Innervation in patients heart failure with preserved ejection fraction

Sandra Marina de Miranda, Mauricio Leao, Antonio Jose Jorge, Wolney Martins, Luana Amorim, Leandro Messias, Evandro Mesquita and Claudio Mesquita
Journal of Nuclear Medicine May 2018, 59 (supplement 1) 1525;
Sandra Marina de Miranda
4Nuclear Medicine Section Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Mauricio Leao
3Nuclear Medicine Section Hospital Universitário Antonio Pedro Niterói Brazil
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Antonio Jose Jorge
2Cardiology Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Wolney Martins
2Cardiology Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Luana Amorim
4Nuclear Medicine Section Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Leandro Messias
4Nuclear Medicine Section Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Evandro Mesquita
1Hospital Pró-Cardíaco Rio de Janeiro Brazil
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Claudio Mesquita
4Nuclear Medicine Section Hospital Universitário Antonio Pedro Niteroi, Rio De Janeiro Brazil
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Abstract

1525

Objectives: Heart Failure (HF) with preserved ejection fraction (EF over 50%) is considered to be the most prevalent HF presentation. The autonomic nervous system (ANS) plays a key role in cardiovascular physiology and its dysfunction has pathophysiologic and prognostic implication in HF. 123I-MIBG scintigraphy is and established method for evaluation of the functional status of adrenergic innervation in HF patients. Nebivolol is a beta-1-selective blocker with vasodilating properties related to nitric oxide (NO) modulation and there is now evidence that NO can modulate the beta-adrenergic stimulation in the normal human myocardium and with dysfunction. This study aimed to evaluate the integrity of the innervation and the cardiac sympathetic tone in patients with heart failure with preserved ejection fraction (HFPEF) and the impact of nebivolol therapy in the sympathetic function.

Methods: It was a longitudinal study which included 24 consecutive ambulatory patients (60.6±10.9 years; 71% female) admitted in a heart failure clinic with a diagnosis of HFPEF. All patients were submitted to scintigraphy with 123I-MIBG and Minnesota Living with Heart Failure Questionnaire (MLHFQ) before and after they have received nebivolol 5 mg twice a day for a period of three months. HMR values standardized to low-energy collimation were used to define the H/M ratios and washout rate.

Results: There were no significant differences in H/M early (p=0.418), H/M delayed (p=0.532) and washout rate (p=0.644) in the basal evaluation compared to that obtained after three months of nebivolol therapy. Patients had significant improvement in clinical symptoms and quality of life as detected by MLHFQ changes after 3 months of nebivolol therapy (43.2 vs. 22.4; p < 0,01). Conclusion: It was concluded that the use of nebivolol for three months does not improve cardiac sympathetic activity in patients with HFPEF in spite of impressive changes in quality of life. These data suggest that nebivolol may improve symptoms in HFPEF patients by additional mechanisms other than cardiac autonomic innervation regulation. Research Support: CAPES and FAPERJ.

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Journal of Nuclear Medicine
Vol. 59, Issue supplement 1
May 1, 2018
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Effects of bet-blocker therapy on the myocardial sympathetic Innervation in patients heart failure with preserved ejection fraction
Sandra Marina de Miranda, Mauricio Leao, Antonio Jose Jorge, Wolney Martins, Luana Amorim, Leandro Messias, Evandro Mesquita, Claudio Mesquita
Journal of Nuclear Medicine May 2018, 59 (supplement 1) 1525;

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Effects of bet-blocker therapy on the myocardial sympathetic Innervation in patients heart failure with preserved ejection fraction
Sandra Marina de Miranda, Mauricio Leao, Antonio Jose Jorge, Wolney Martins, Luana Amorim, Leandro Messias, Evandro Mesquita, Claudio Mesquita
Journal of Nuclear Medicine May 2018, 59 (supplement 1) 1525;
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