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Australian Trends in Procedural Characteristics and Outcomes in Patients Undergoing Percutaneous Coronary Intervention for ST-Elevation Myocardial Infarction Correction of a pathogenic gene mutation in human embryos ACC临床简报:新型冠状病毒对心脏的影响(2019-nCoV) Age-specific gender differences in early mortality following ST-segment elevation myocardial infarction in China Clinical Implications of Periprocedural Myocardial Injury in Patients Undergoing Percutaneous Coronary Intervention for Chronic Total Occlusion: Role of Antegrade and Retrograde Crossing Techniques Blood CSF1 and CXCL12 as Causal Mediators of Coronary Artery Disease CSC Expert Consensus on Principles of Clinical Management of Patients with Severe Emergent Cardiovascular Diseases during the COVID-19 Epidemic Contemporary Approach to Coronary Bifurcation Lesion Treatment Association of All-Cause and Cardiovascular Mortality With High Levels of Physical Activity and Concurrent Coronary Artery Calcification Precision Medicine in TAVR: How to Select the Right Device for the Right Patient
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Original Research2019 May 7. pii: EIJ-D-18-01082.

JOURNAL：EuroIntervention. Article Link

Pulmonary Artery Denervation Using Catheter based Ultrasonic Energy

Rothman A, Jonas M, Castel D et al. Keywords: pulmonary artery denervation; pulmonary hypertension

ABSTRACT

AIMS -  Pulmonary arterial hypertension is a devastating disease characterized by pulmonary vascular remodelling and right heart failure. Radio-frequency pulmonary artery denervation (PDN) improves pulmonary hemodynamics in pre-clinical and early clinical studies, however denervation depth is limited. High-frequency non-focused ultrasound can deliver energy to the vessel adventitia, sparing the intima and media. We therefore investigated the feasibility, safety and efficacy of ultrasound PDN.

 

METHODS AND RESULTS -  Histological examination demonstrated that innervation of human pulmonary arteries are predominantly sympathetic (71%), with >40% of nerves at a depth of >4mm. Finite element analysis of ultrasound energy distribution and ex-vivo studies demonstrated generation of temperatures >47ºC to a depth of 10mm. In domestic swine PDN reduced mean pulmonary artery pressure induced by thromboxane A2 in comparison to sham. No adverse events were observed to 95-days. Histological examination identified structural and immunohistological alterations of nerves in PDN treated animals, with sparing of the intima and media and reduced tyrosine hydroxylase staining 95-days post-procedure indicating persistent alteration of the structure of sympathetic nerves.

 

CONCLUSIONS -  Ultrasound PDN is safe and effective in the pre-clinical setting, with energy delivery to a depth that will permit targeting sympathetic nerves in humans.

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