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Published in: Clinical Research in Cardiology 5/2021

01-05-2021 | Neurotomy | Original Paper

Myocardial salvage is increased after sympathetic renal denervation in a pig model of acute infarction

Authors: Luigi Emilio Pastormerlo, Silvia Burchielli, Marco Ciardetti, Giovanni Donato Aquaro, Chrysantos Grigoratos, Vincenzo Castiglione, Angela Pucci, Maria Franzini, Assuero Giorgetti, Paolo Marzullo, Eleonora Benelli, Silvia Masotti, Veronica Musetti, Fabio Bernini, Sergio Berti, Claudio Passino, Michele Emdin

Published in: Clinical Research in Cardiology | Issue 5/2021

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Abstract

Rationale

Despite advances in treatment of acute myocardial infarction (AMI), many patients suffer significant myocardial damage with cardiac dysfunction. Sympathetic renal denervation (RD) may reduce adrenergic activation following AMI.

Objective

To investigate the potential role of RD limiting myocardial damage and remodeling when performed immediately after AMI.

Methods and results

Sixteen farm pigs underwent 90 min left anterior descending artery balloon occlusion. Eight pigs underwent RD immediately after reperfusion. LV function, extent of myocardium at risk, and myocardial necrosis were quantified by cardiac magnetic resonance 5 and 30 days after AMI. 123I-MIBG scintigraphy was performed 31 days after AMI to image myocardial sympathetic innervation. Heart norepinephrine was quantified (from necrotic, border and remote zone). RD and control did not differ in myocardium at risk extent (59 ± 9 vs 55 ± 11% of LV mass) at 5 days. At 30 days CMR, RD pigs had smaller necrotic areas than control as assessed by gadolinium delay enhancement (18 ± 7 vs 30 ± 12% of LV mass, p = 0.021) resulting in improved myocardial salvage index (60 ± 11 vs 44 ± 27%, p < 0.001). RD pigs had higher cardiac output (3.7 ± 0.8 vs 2.66 ± 0.7 L/min, p < 0.001) and lower LV end diastolic volume (98 ± 16 vs 113 ± 31 ml, p = 0.041). 123I-MIBG defect extension was smaller in RD than control (60 ± 28 vs 78 ± 17%, p < 0.05) with significant reduction in the difference between innervation and perfusion defects (25 ± 12 vs 36 ± 30%, p = 0.013). NE content from necrotic area (238; IQR 464 vs 2546; IQR 1727 ng/g in RD and control, respectively, p < 0.001) and from border zone (295; IQR 264 vs 837; IQR 207 in RD and control, respectively, p = 0.031) was significantly lower in RD than control.

Conclusions

RD results in increased myocardial salvage and better cardiac function, when performed immediately after AMI. Reduction of sympathetic activation with preservation of cardiac sympathetic functionality warranted by RD may sustain these effects.

Graphic abstract

Appendix
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Metadata
Title
Myocardial salvage is increased after sympathetic renal denervation in a pig model of acute infarction
Authors
Luigi Emilio Pastormerlo
Silvia Burchielli
Marco Ciardetti
Giovanni Donato Aquaro
Chrysantos Grigoratos
Vincenzo Castiglione
Angela Pucci
Maria Franzini
Assuero Giorgetti
Paolo Marzullo
Eleonora Benelli
Silvia Masotti
Veronica Musetti
Fabio Bernini
Sergio Berti
Claudio Passino
Michele Emdin
Publication date
01-05-2021
Publisher
Springer Berlin Heidelberg
Published in
Clinical Research in Cardiology / Issue 5/2021
Print ISSN: 1861-0684
Electronic ISSN: 1861-0692
DOI
https://doi.org/10.1007/s00392-020-01685-y

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