The Prospective Risk Factor Evaluation & Discovery In CTEPH Study (PREDICT PH)

The Prospective Risk Factor Evaluation and Discovery In Chronic Thromboembolic Pulmonary Hypertension Study

This research study wants to find markers in the blood that may help to predict a patient's future risk of developing a disease called CTEPH. The study also wants to see if active monitoring for signs and symptoms of CTEPH after a pulmonary embolism (a blood clot in the lungs) can improve the diagnosis of CTEPH.

Patients who enroll in this study will have periodic blood draws and clinic and/or phone follow-up to monitor for signs and symptoms of CTEPH. Patients' medical records will also be reviewed for information related to pulmonary embolisms and/or CTEPH.

Study Overview

• Status: Unknown
• Conditions: Chronic Thromboembolic Pulmonary Hypertension
• Intervention / Treatment: Procedure: Post-pulmonary embolism follow up protocol

Detailed Description

Chronic thromboembolic pulmonary hypertension (CTEPH) is due to non-resolution of pulmonary embolism (PE), and is the most serious long-term sequela of PE. Without treatment, CTEPH leads to progressive right heart failure and death. Fortunately, most cases of CTEPH are potentially curable by a surgical procedure in which the chronic thromboembolic material is removed from the pulmonary arterial tree, and for those who are not surgical candidates a novel medical therapy is now available. Multiple studies have shown, however, that the majority of CTEPH cases go undiagnosed, and thus many symptomatic patients are never offered these potentially beneficial treatments. Because persistent dyspnea affects up to 50% of patients who survive an acute PE, selecting which patients should undergo further invasive testing for CTEPH is a difficult clinical problem. In this study, the investigators propose to prospectively follow a cohort of high-risk patients after acute PE until CTEPH is either diagnosed or excluded, and perform serial collection and banking of biospecimens that will allow for prospective and longitudinal screening of biomarkers that might predict future risk of CTEPH. Biomarker screening will initially be focused on a panel of 20 pre-specified plasma proteins with roles in coagulation/fibrinolysis or inflammation, as well as assays of fibrinolysis, as these are processes that existing literature suggests are linked to the pathophysiology of CTEPH. The biorepository created for this study could also be used in the future to perform unbiased screening with proteomic techniques or RNAseq in the hopes of identifying novel biomarkers and novel biological processes that are relevant to the development of CTEPH. As there is no current consensus as to whether structured follow-up after PE to detect signs and symptoms of CTEPH is beneficial, this study also includes an analysis of whether a novel structured follow-up program improves identification of incident CTEPH cases. This study has the potential to dramatically improve post-PE care by facilitating stratification of patients by future risk of CTEPH at the time of acute PE, thus allowing for expert follow-up to be tailored to those patients at highest risk for CTEPH. The investigators hope that these efforts will improve the rate at which CTEPH cases are identified, so that more patients can benefit from existing treatments.

• Study Type: Interventional
• Enrollment (Anticipated): 130
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Utah
    • Murray, Utah, United States, 84107
      • Recruiting
      • Intermountain Medical Center
      • Contact: David P Tomer, MS; Phone Number: (801) 507-4694; Email: David.Tomer@imail.org
      • Principal Investigator: Mark W Dodson, MD PhD
      • Sub-Investigator: Greg Elliott, MD
      • Sub-Investigator: Lynette M Brown, MD PhD
      • Sub-Investigator: Kirk Knowlton, MD
      • Sub-Investigator: Matthew Rondina, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

i. Age ≥ 18 years.

ii. Presence of pulmonary embolism (PE) objectively diagnosed by ventilation/perfusion (V/Q) scan or computed tomography pulmonary angiography (CTPA).

iii. Plus one of:

• Prior history of PE before the index event (predicted 2-year incidence of chronic thromboembolic pulmonary hypertension (CTEPH) of 35%).
• Transthoracic echocardiogram (TTE) performed within 72 hours of PE diagnosis demonstrating a maximum velocity of the tricuspid regurgitant (TR) jet ≥ 3.0 meters/second (predicted 2-year incidence of CTEPH of approximately 25%).
• CTPA demonstrating involvement of one of the main pulmonary arteries with PE (predicted 2-year incidence of CTEPH of approximately 15%).
• CTEPH prediction score ≥ 6 (this score is based on several clinical factors, including unprovoked nature of the PE, presence of right ventricular dysfunction by CTPA or TTE, presence of hypothyroidism or diabetes, and thrombolytic therapy for PE).

Exclusion Criteria:

i. The patient previously met diagnostic criteria for pulmonary hypertension of any cause.

ii. Presence of significant left ventricular systolic dysfunction (defined by left ventricular ejection fraction ≤ 45% by TTE), or left sided valvular disease (including mitral or aortic regurgitation or stenosis).

iii. Age > 85 years.

iv. The presence of metastatic malignancy (due to the expected limitation of lifespan to less than the study follow-up period of 2 years).

v. The presence of a significant psychiatric disorder or significant cognitive impairment, which would make follow-up and/or symptom reporting difficult.

vi. Inability or unwillingness to attend follow-up clinic appointments at Intermountain Medical Center (including geographical, financial, and insurance limitations).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Screening
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
No Intervention: Post-Intervention Cohort (Aim 1); This arm will not have the intervention of the implementation of the structured post-pulmonary embolism follow up protocol that is outlined in Aim 1.
Experimental: Pre-Intervention Cohort (Aim 3); This arm will have the intervention of the implementation of the structured post-pulmonary embolism follow up protocol that is outlined in Aim 1.	Procedure: Post-pulmonary embolism follow up protocol; Structured post-pulmonary embolism follow up protocol (outlined in Aim 1)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Chronic Thromboembolic Pulmonary Hypertension (CTEPH) diagnosis rate	Number of CTEPH diagnoses divided by number of patients in each cohort (pre- and post-intervention)	Day of diagnosis of pulmonary embolism (PE) until 2 years after day of diagnosis of PE

Collaborators and Investigators

• Sponsor: Mark W. Dodson
• Investigators: Principal Investigator: Mark W Dodson, MD PhD, Intermountain Health Care, Inc.

Study record dates

Study Major Dates

• Study Start (Actual): April 17, 2018
• Primary Completion (Anticipated): May 1, 2021
• Study Completion (Anticipated): August 1, 2021

Study Registration Dates

• First Submitted: March 12, 2018
• First Submitted That Met QC Criteria: March 12, 2018
• First Posted (Actual): March 19, 2018

Study Record Updates

• Last Update Posted (Actual): May 17, 2019
• Last Update Submitted That Met QC Criteria: May 15, 2019
• Last Verified: May 1, 2019

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Cardiovascular Diseases; Vascular Diseases; Respiratory Tract Diseases; Lung Diseases; Hypertension; Hypertension, Pulmonary
• Other Study ID Numbers: 1050516

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Per the consent: "The scientific results from this study may be reported at scientific discussions or published in medical journals. You will not be identified personally in any presentation or published report." "If your samples and data are shared with researchers at other hospitals and institutions outside of Intermountain Healthcare, they will be labeled with a de-identified code so that researchers outside of Intermountain Healthcare will not be able to identify you."
• IPD Sharing Time Frame: Available: After the end of the study For how long: Indefinite
• IPD Sharing Access Criteria: Appropriate data sharing agreements must be established with Intermountain Healthcare prior to any sharing of individual participant data.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; ICF

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No