Side effects of TEVAR and EVAR on the heart: Myth or reality?
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1 Side effects of TEVAR and EVAR on the heart: Myth or reality? Christos D. Liapis, MD, FACS, FRCS, FEBVS Professor (Em) of Vascular Surgery National & Kapodistrian University of Athens Director Vascular & Endovascular Clinic Athens Medical Center 7/12/2018
2 NO DISCLOSURES RELATED TO THE TOPIC
3 EVAR and cardiovascular Outcome A non-significant tendency toward cardiovascular deaths was apparent in the EVAR trials in the endovascular group during the 24-month interval. Cardiovascular mortality was primarily due to the required secondary interventions. 1. Brown LC, et al. EVAR trial participants. Does EVAR alter the rate of cardiovascular events in patients with AAA considered unfit for open repair? Results from the randomized EVAR trial 2. EJVES Brown LC, et al. EVAR trial participants. Incidence of cardiovascular events and death after open or endovascular repair of abdominal aortic aneurysm in the randomized EVAR trial 1. Br J Surg. 2011
4 ACE Study 2007 Survival free of reinterventions Courtesy J.P Becquemin, IMAD Sept. 2018
5 French Endurant Registry (REF) 2017 Survival free of reinterventions Courtesy J.P Becquemin, IMAD Sept. 2018
6 ACE Study 2007: Survival at 4 years Courtesy J.P Becquemin, IMAD Sept. 2018
7 French Endurant Registry (REF) 2017 Survival at 4 years Courtesy J.P Becquemin, IMAD Sept. 2018
8 Short-term vs. long-term MI following EVAR and Open AAA Repair b Stather et.al British Journal of Surgery 2013; 100:
9 Arterial Stiffness Arterial stiffening results in increased pulse pressure, left ventricular hypertrophy, subendocardial ischemia, endothelial dysfunction and cardiac fibrosis Liao J et al Curr Ather Reports 2014
10 Pulse wave velocity (PWV) and arterial stiffness Pulse wave velocity (PWV): the gold standard method of arterial stiffness measurement and a strong independent predictor of cardiovascular morbidity and mortality. CARDIOVASCULAR SURVIVAL months Blacher J. et al Circulation. 1999;99: Cavalcante JL et al JACC 2011; Ben-Shlomo Y et al JACC 2013
11 Arterial stiffness, circulating vascular calcification inhibitors and inflammatory mediators in pts with AAA PWV and hscrp, WBC, IL-6, Osteoprotegerin were significantly upregulated in pts with AAA. Independent association of PWV with mean blood pressure, OPG and AAA diameter Kadoglou NP, Liapis CD et al. Arterial stiffness and novel biomarkers in patients with abdominal aortic aneurysms. Regul Pept. 2012
12 Changes in arterial stiffness in patients undergoing EVAR and TEVAR Computational Fluid Dynamics
13 Cardiovascular magnetic resonance elastography Magnetic resonance elastography (MRE) is a phase contrast magnetic resonance imaging technique that measures tissue stiffness non invasively. Khan S. et.al NMR in Biomedicine. 2017
14 4D MRI and aortic stiffness Schäfer et al J Vasc Surg 2018
15 Changes in arterial stiffness in patients undergoing AAA repair Open repair (n=39) of AAA induced modest increase of PWV EVAR (n=48) was associated with significant increase in PWV at 6 months Lantelme P et al J Hypertens 2009 Kadoglou NP, Moulakakis KG, Liapis CD. Changes in aortic pulse wave velocity of patients undergoing endovascular repair of abdominal aortic aneurysms. J Endovasc Ther. 2012
16 Differential effects of stent-graft fabrics on arterial stiffness in patients undergoing EVAR N=118 pts Values of PWV and novel biomarkers at baseline and after 12 months PWV, OPG and IL-8 increase was more pronounced in Polyester Woven group compared to PTFE group (p=0.033, p=0.048, p<0.001 respectively) Kadoglou NP, Moulakakis KG, Liapis CD. Differential effects of stent-graft fabrics on arterial stiffness in patients undergoing endovascular aneurysm repair. J Endovasc Ther. 2014
17 Effect of abdominal aortic endoprostheses on arterial pulse wave velocity in an in vitro abdominal aortic flow model Three abdominal aortic endoprostheses (AFX, Endurant II, Nellix) Identical silicone aneurysm models. One model was left untreated, and another model contained an aortic tube graft (Gelweave). The models were placed in an in vitro flow set-up that mimics physiological flow. Results: apwv was significantly lower for the control compared to the AFX, Endurant, Nellix and tube graft models (P < 0.05). Structural stiffness of the AFX model was significant lower compared to the control model (P < 0.001), whereas all other models showed higher structural stiffness. Noort K. et.al Physiological Measurement 2018, Volume 39, Number 10
18 7-day cardiac effects of EVAR Takeda Y. et al Circ J 2014;78:
19 7-day cardiac effects of EVAR Positive correlation between PWV and LV mass Takeda Y. et al Circ J 2014;78:
20 EVAR alters cardiac structure and function 1 year post op increased bapwv induced left ventricular hypertrophy, left atrium enlargement and impaired diastolic function Takeda Y et al Circ J 2014
21 Pre and 1 year post op exercise tolerance PRE-OP LV COMPLIANCE CHANGE IN PWV CHANGE IN LEFT ATRIAL VOL Takeda Y. et al Circ J 2014;78:
22 Non-invasive Determination of Aortic Mechanical Properties and Their Effects on Left Ventricular Function Following EVAR The stiffer endograft does not appear to acutely increase aortic impedance, though it does alter the timing of reflected waves which may have negative effects on LV function. Pre-EVAR Post-EVAR Gregory A. et.al Journal of Medical and Biological Engineering 2018
23 Arterial stiffness and thoracic endografts M, 79y, Symptomatic 8cm TAA Medtronic VALIANT Thoracic 40X40, 46X46
24 PWV and NT-proBNP changes in pts following TEVAR Endovascular treatment of descending thoracic aortic aneurysms was associated with significantly increased NT-proBNP levels and arterial stiffness. An increased cardiac risk for patients with already impaired cardiac compensatory mechanism? Moulakakis K., Liapis CD et.al. Ann Vasc Surg 2017
25 Conclusions (I) TEVAR and EVAR are associated with lower perioperative mortality and morbidity rates compared to open surgical repair BUT this advantage is blunted at long term, mainly due to an increase in cardiovascular complications. Arterial stiffening together with adverse cardiac function after stent graft implantation may explain this change in the long-term outcome
26 Conclusions (II) There is evidence of increased arterial stiffness after EVAR related to graft type (polyester more than PTFE). Arterial stiffness should be taken into consideration by the industry when designing new endografts. In the meantime patients after endovascular treatment of aneurysms are in need of intensive cardiac follow up.
27 Future studies Examine changes in proximal aortic impedance, ascending aortic compliance, pulse wave analysis, PWV, LV load, and LV systolic/diastolic function pre and post op, including long term, for aortic arch, TEVAR and EVAR cases. Examine differences in cardiac effects between graft material, length of the covered aorta, diabetics and chronic renal failure patients.
28 Thank you for your attention
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