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Goncharova NS, Condori Leandro HI, Vakhrushev AD, et al. Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility. BMC Pulm Med. 2021;21(1):418doi: 10.1186/s12890-021-01786-y.
Goncharova, N. S., Condori Leandro, H. I., Vakhrushev, A. D., Koshevaya, E. G., Skorik, Y. A., Mitrofanova, L. B., Murashova, L. A., Korobchenko, L. E., Andreeva, E. M., Lebedev, D. S., Moiseeva, O. M., & Mikhaylov, E. N. (2021). Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility. BMC pulmonary medicine, 21(1), 418. https://doi.org/10.1186/s12890-021-01786-y
Goncharova, Natalia S, et al. "Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility." BMC pulmonary medicine vol. 21,1 (2021): 418. doi: https://doi.org/10.1186/s12890-021-01786-y
Goncharova NS, Condori Leandro HI, Vakhrushev AD, Koshevaya EG, Skorik YA, Mitrofanova LB, Murashova LA, Korobchenko LE, Andreeva EM, Lebedev DS, Moiseeva OM, Mikhaylov EN. Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility. BMC Pulm Med. 2021 Dec 18;21(1):418. doi: 10.1186/s12890-021-01786-y. PMID: 34922518; PMCID: PMC8684280.
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BMC Pulm Med. 2021 Dec 18;21(1):418. doi: 10.1186/s12890-021-01786-y.

Transcatheter radiofrequency pulmonary artery denervation in swine: the evaluation of lesion degree, hemodynamics and pulmonary hypertension inducibility.

BMC pulmonary medicine

Natalia S Goncharova, Heber Ivan Condori Leandro, Aleksandr D Vakhrushev, Elena G Koshevaya, Yury A Skorik, Lubov B Mitrofanova, Lada A Murashova, Lev E Korobchenko, Elizaveta M Andreeva, Dmitry S Lebedev, Olga M Moiseeva, Evgeny N Mikhaylov

Affiliations

  1. Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341. [email protected].
  2. Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341.
  3. Almazov National Medical Research Centre, 2, Akkuratova Str., Saint-Petersburg, Russian Federation, 197341. [email protected].

PMID: 34922518 PMCID: PMC8684280 DOI: 10.1186/s12890-021-01786-y

Abstract

BACKGROUND: Mechanisms of positive effects of pulmonary artery (PA) denervation (PADN) remain poorly understood. The study aimed to evaluate pulmonary hemodynamic changes after PADN and their association with the extent of PA wall damage in an acute thromboxane A2 (TXA2)-induced pulmonary hypertension (PH) model in swine.

METHODS: In this experimental sham-controlled study, 17 normotensive male white Landrace pigs (the mean weight 36.2 ± 4.5 kg) were included and randomly assigned to group I (n = 9)-PH modeling before and after PADN, group II (n = 4)-PADN only, or group III (n = 4)-PH modeling before and after a sham procedure. Radiofrequency (RF) PADN was performed in the PA trunk and at the proximal parts of the right and left PAs. PA wall lesions were characterized at the autopsy study using histological and the immunohistochemical examination.

RESULTS: In groups I and II, no statistically significant changes in the mean pulmonary arterial pressure nor systemic blood pressure were found after PADN (-0.8 ± 3.4 vs 4.3 ± 8.6 mmHg, P = 0.47; and 6.0 ± 15.9 vs -8.3 ± 7.5 mmHg, P = 0.1; correspondingly). There was a trend towards a lower diastolic pulmonary arterial pressure after PADN in group I when compared with group III during repeat PH induction (34.4 ± 2.9 vs 38.0 ± 0.8; P = 0.06). Despite the presence of severe PA wall damage at the RF application sites, S100 expression was preserved in the majority of PA specimens. The presence of high-grade PA lesions was associated with HR acceleration after PADN (ρ = 0.68, p = 0.03). No significant correlation was found between the grade of PA lesion severity and PA pressure after PADN with or without PH induction.

CONCLUSIONS: Extended PADN does not affect PH induction using TXA2. Significant PA adventitia damage is associated with HR acceleration after PADN. Possible delayed effects of PADN on perivascular nerves and pulmonary hemodynamics require further research in chronic experiments.

© 2021. The Author(s).

Keywords: Large animal models; Pulmonary denervation; Pulmonary hypertension; Radiofrequency ablation; Synthetic analogue of thromboxane A2

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