Assessment of Safety and Accuracy of the Microtech System in Patients Undergoing Left Ventricular Assist Device Implantation

Microtech Medical Technologies, Ltd15 enrolled

Overview

The Microtech-LVAD study is designed as a prospective, single arm, multi-center early feasibility study. Approximately 15 patients will be enrolled in the study. The study will be limited to patients in whom it is decided, based on routine clinical practice, that the LVAD will be implanted via a midline sternotomy. In the first 5 study patients, the device will be implanted in the RA; subsequently, the device will be implanted in the LA unless the patient is deemed at high risk of post-LVAD right heart failure, in which case the device will be placed in the RA

Study Type

INTERVENTIONAL

Allocation

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Heart Failure

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria: * Patient is scheduled to undergo an elective LVAD implantation via midline sternotomy based on routine practice at the participating center. * Patient is characterized as INTERMACS profile 2 or greater. * Patient is able and willing to provide written informed consent. * Patient is willing and able to comply with all required post-procedure follow-up visits. Exclusion Criteria: * Pre-operative coagulopathy or thrombocytopenia * For an intended LA implant, patient has a device implanted in the left atrial appendage (e.g., WATCHMAN or similar device) or a mechanical mitral valve * Patient has an atrial myxoma * Patient has pre-operative evidence of thrombus in the chamber in which the device is intended to be implanted * Patient has a history of stroke or transient ischemic attack within 6 months prior to the index procedure * History of systemic or pulmonary thromboembolism or deep vein thrombosis (DVT) within the last 6 months * Patient has a history of congenital heart disease, including known atrial septal defect that is not corrected (including during the LVAD implantation procedure) * Patient has severe mitral regurgitation (for an LA implant) or severe tricuspid regurgitation (for an RA implant) that is not intended to be corrected during the LVAD implantation * Patient has known allergy to stainless steel or titanium * Patient has noncardiac comorbidity that, in the opinion of the Principal Investigator, may limit life expectancy to less than 1 year * Patient is pregnant or intends to become pregnant prior to completion of all protocol follow-up requirements * Patient is participating in another investigational study that has not reached its primary endpoint * Intraoperative identification of any anatomical finding that would preclude safe access to, or closure of, the intended atrial chamber, or fixation of the device within the chamber including, but not limited to: 1. Identification of thrombus in the atrium in which the device will be implanted 2. Atrial anatomy deemed to be too thin or fragile to accept the implant 3. Epicardial adhesions or any intraoperative finding that would complicate access or closure of the atrium in which the device is intended to be implanted

Outcomes

Primary Outcomes

Co-Primary Efficacy Endpoint

1. Successful deployment of the intracardiac sensor. 2. Freedom from failure of the Microtech System to obtain valid intracardiac pressures by at least one method (CW/DB), in at least one timepoint up to 6 months.

Time frame: 6 months

Co-Primary Safety Endpoint

1. Anatomic stability of the implant assessed by echocardiographic imaging through 1 month. 2. The incidence of device- or implant procedure-related adverse events through 1 month

Time frame: 1 month

Secondary Outcomes

The earliest post-operative day at which "valid" pressure measurements can be made from the Microtech implant

The earliest post-operative day at which "valid" pressure measurements can be made from the Microtech implant. A "valid" pressure measurement will be defined as a signal for which the system indicates a "fidelity score" \>0.7. Details of the fidelity score are provided in the protocol

Time frame: 1 month

Accuracy of Microtech pressure measurements in comparison to those obtained simultaneously by pulmonary artery catheter

Accuracy of Microtech pressure measurements in comparison to those obtained simultaneously by pulmonary artery catheter (PAC; LAP from Microtech compared to PCWP from PAC, and RAP from Microtech and RAP from PAC or superior vena caval central line) at baseline and at a follow up between 3- and 6-months post implantation

Time frame: pre procedure, 3-6 months

Accuracy of Microtech pressure measurements in comparison to those obtained simultaneously by pulmonary artery catheter

Accuracy of Microtech pressure measurements in comparison to those obtained simultaneously by pulmonary artery catheter (LAP from Microtech compared to PCWP from PAC, and RAP from Microtech and RAP from PAC or superior vena caval central line) at all follow visits from which data are available throughout the 1 year follow up period

Time frame: 1 year

Anatomic stability of the implant over the observation period

Anatomic stability of the implant over the observation period, assessed by echocardiographic imaging at post-op, 1, 3-6, 9, 12 months follow-up visits

Time frame: post operation, 1 month, 3-6 months, 9 months, 12 months

The incidence of device-related adverse events

The incidence of device-related adverse events through 1 year follow-up

Time frame: 12 months

Correlation of changes of sensor-measured atrial pressure

Correlation of changes of sensor-measured atrial pressure with the following clinical parameters performed on the 1, 3-6, 9 and 12 month follow up visits: 1. changes of NTproBNP 2. changes of KCCQ 3. episodes of heart failure exacerbations 4. LVAD suction events 5. clinical assessments consistent with hypovolemia 6. changes in pressure measurements during RPM ramp tests

Time frame: 1 month, 3-6 months , 9months and 12 month

Usability of the system

Usability of the system in order to obtain pressure measurements (Human Factors testing) at baseline, 3-6 months and 12 months visits

Time frame: baseline, 30-6 months, 12 months