Left Ventricular Reverse Remodeling In Aortic Valve Replacement With Single Strip Pericardium Versus Mechanical Valve

Left Ventricular Reverse Remodeling In Aortic Valve Replacement With Single Strip Pericardium Versus Mechanical Valve

Left Ventricular Reverse Remodeling in Aortic Valve Replacement With Single Strip Pericardium and Mechanical Valve: A Comparative Study

Aortic stenosis is a commonly found heart disease, which often leads to mortality and morbidity. Valve replacement using mechanical prosthetic valve will have an expensive cost especially in the Integrated Heart Center of Cipto Mangunkusumo Hospital, Jakarta, Indonesia. In addition to the expensive cost, patients who have mechanical prosthetic valve have an increased risk of infection of the prosthetic valve and developing thrombo-embolism thus have to consume a lifelong anticoagulant therapy that increase risk of bleeding. A surgical technique using autologous pericardium is an alternative to prosthetic valve replacement, one of which is a single pericardium strip technique that uses modified autologous pericardium technique from Ozaki et al and Duran et al. The objective of this study is to investigate the outcome of aortic valve replacement with a single pericardium strip of autologous pericardium in patients with aortic stenosis. This study will be conducted at the Integrated Heart Center of Cipto Mangunkusumo Hospital, Jakarta, Indonesia, by using quasi experimental type time series design. Subjects are patients with aortic stenosis who are candidates for valve replacement. Inclusion criteria is having low to moderate surgical risk (EuroScore II <5). The sampling method used in this study is non-probability consecutive sampling. This study will assess the outcome of the aortic valve replacement (valve hemodynamic, left ventricular reverse remodelling, sST2, 6MWT) at 3 months and 6 months post-aortic valve replacement. It is expected that aortic valve replacement using a single strip of autologous pericardium will have good valve hemodynamic outcome, yield left ventricular reverse remodelling, decrease sST2 level, show upgrade in 6MWT, and have shorter aortic cross clamp time so that it can be an alternative to aortic valve replacement using mechanical prosthetic valve that is less expensive and have good outcomes in patient with aortic stenosis.

Aortic Stenosis, Aortic Valve Replacement, Single Strip Pericardium, Autologous Pericardium, Mechanical Valve Replacement, Comparison of Left Ventricle Remodeling

The anterior pericardium is taken in accordance with the measurements made using an aortic annulus sizer or Ismail sizer. The diameter of the annulus valve is converted to circumference of the aortic valve according as a measure of the length of the pericardium. Measurement of aortic commissure height is done by measuring the distance between the lowest point of the valve attachment to the highest point on the commissure as a measure of pericardium width. The pericardium is immersed in 0.6% glutaraldehyde solution for 10 minutes, then rinsed and soaked with saline solution 3 times for 6 minutes each. After the pericardium becomes firm it is cut to be a single strip according to the length and width in the previous measurement. It is then sutured to the aortic valve annulus.

Median incision is performed at the surgical site. Sternal retractor is placed at the sternum after median sternotomy being performed. Aortic valve is measured using aortic annulus sizer. Pledgeted suture is performed for the mattress. Sutures are performed to attach the mechanical prosthetic to the aortic annulus.

Left Ventricular End Diastolic Diameter in mili meters assessed by Trans-thoracic Echocardiography measurement on M-mode

Left Ventricular End Systolic Diameter in mili meters assessed by Trans-thoracic Echocardiography measurement on M-mode

Ejection Fraction Percentage assessed by Trans-thoracic Echocardiography with modified Simpson's volumetric method (BiPlane measurement: apical 4 chambers and apical 2 chambers)

Subjects will be asked to walk for six minutes on a given track then the distance achieved will be measured in meters

The result of distance in meters of the six minute walking test will be converted to VO2max by the given formula: (distance in meters x 0.03) + 3.98 = VO2max Then the VO2max will be converted to METs by given formula: VO2max : 3.5 = METs

Level of soluble Suppression of Tumorigenicity-2 measured in nano gram per mili Liters (ng/mL) by quantitative sandwich enzyme immunoassay technique assessed with Quantikinine Elisa

Aortic Valve Coaptation height measured in mili meters by Trans-oesophageal Echocardiography on mid-oesophageal long axis view

Effective Height of Aortic Valve measured in mili meters from Aortic annulus to the highest point of Aortic Valve coaptation by Trans-oesophageal Echocardiography in mid-oesophageal long axis view

Aortic Jet Velocity value measured in meters per second (m/s) by Color Wave Doppler on Trans-thoracic Echocardiography

Mean Trans-aortic Pressure Gradient Value measured in mili meters Hydrargyrum (mmHg) with Bernoulli equation on Trans-thoracic Echocardiography

Aortic Stenosis Severity classified as mild, moderate, and severe based on Recommendations from European Association of Echocardiography and American Society of Echocardiography (EAE/ASE)

Aortic Regurgitation Severity classified as mild, moderate, and severe based on Recommendations from American Society of Echocardiography

Number of hours in the Intensive Care Unit since after the surgery until subject is transferred to hospital ward

Inclusion Criteria: Patients aged more than 10 years old Patients with aortic valve stenosis with an indication of aortic valve replacement having low to moderate surgical risk (EuroScore II <5) The patient or guardian (the research subject's parent) agrees to follow the study Exclusion Criteria: Patients who have previously underwent aortic valve replacement Patients with aortic stenosis due to bicuspid aortic valve Patients with autoimmune disease Patients with mixed connective tissue disease

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