Ventilation and Perfusion Scan in Pulmonary Embolism Following Catheter Directed Thrombectomy Versus Anticoagulation Alone

Pulmonary Hypertension Clinical Trial

— VQPE  

Official title:

Ventilation and Perfusion Imaging in Acute Pulmonary Embolism Following Catheter Directed Aspiration Thrombectomy Versus Conservative Therapy Alone: A Pilot Study

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05133713
• Other study ID #: STUDY00000091
• Status: Recruiting
• Start date: April 1, 2022
• Est. completion date: January 1, 2024

Study information

• Verified date: September 2022
• Source: University of Arizona
• Contact: Carol Stuehm
• Phone: 520-626-8318
• Email: carols[@]email.arizona.edu
• Is FDA regulated: No
• Study type: Observational [Patient Registry]

Clinical Trial Summary

Clinical presentation of acute pulmonary embolism (PE) is complex and varied and not uncommonly involves respiratory failure with dyspnea or hypoxia. Patients with persisting signs of respiratory failure despite anticoagulation, may benefit from catheter directed thrombectomy. Additionally, patient who receive thrombectomy are likely to have a lower residual thrombus burden measurable by ventilation-perfusion (V/Q) scan, and thereby less likely to develop chronic sequela, including chronic thromboembolic pulmonary hypertension (CTEPH) and post PE syndrome.

Description:

Acute pulmonary embolism (PE) is a common disease with variable presentation and clinical outcomes. Chronic sequelae including chronic thromboembolic pulmonary hypertension (CTEPH) and post-PE syndrome are common pathologies for patient who survive the already significant inpatient mortality, and have a significant impact on both quality of life and life expectancy. To date, the ELOPE trial is the only study to prospectively compare quality of life (QoL) and dyspnea measures and six-minute walk distance (6MWD) to cardiopulmonary exercise test, revealing worse post-PE syndrome in select populations, however this study is limited to a single arm that received anticoagulation alone. New catheter directed therapies, developed in response to such poor outcomes, provide treatment options for acute PE patients when first line therapies including anticoagulation are contraindicated or have failed.

Long term studies utilizing imaging have shown a majority of patients diagnosed with PE have residual pulmonary thrombi after 6 months, which is likely to be a large contributor to the development of CTEPH. Ventilation-perfusion (V/Q) scans remain the gold standard for detection of both acute and chronic pulmonary embolism and will serve as a primary outcome measure at 6 months post initial treatment. Clinical measures including 6MWD, QoL and dyspnea questionaries will be assessed prior to discharge, and at 1 and 6 months, in order to characterize the development of chronic symptomatology.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 50
• Est. completion date: January 1, 2024
• Est. primary completion date: December 1, 2023
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Age >18 years

2. Clinical signs and symptoms consistent with acute PE

3. Echocardiogram, CT pulmonary angiogram (CTPA) or pulmonary angiographic evidence of proximal filling defect in at least one main or lobar pulmonary artery

4. Scheduled for PE treatment with catheter directed therapy and systemic anticoagulation or anticoagulation alone per the investigator's discretion

5. Signs of respiratory failure including a. arterial blood saturation <90%, or b. partial arterial oxygen pressure <60 mmHg, or c. persistent tachypnea with respiratory rates > 20/min

Exclusion Criteria:

1. Unable to be anticoagulated with heparin or alternative therapy

2. Diagnosis with a minor PE without signs of right ventricular (RV) dysfunction

3. Known sensitivity to radiographic contrast agents that, in the Investigator's opinion, cannot be adequately pre-treated

4. Imaging evidence or other evidence that suggests, in opinion of the Investigator, the patient is not appropriate for mechanical thrombectomy intervention (e.g., inability to navigate to target location or predominately chronic clot)

5. Life expectancy <6 months, as determined by the Investigator

Related Conditions & MeSH terms

• Chronic Thromboembolic Pulmonary Hypertension
• Embolism
• Hypertension
• Hypertension, Pulmonary
• Pulmonary Embolism
• Pulmonary Hypertension

Intervention

Device:
• Catheter directed therapy
Thrombectomy

Drug:
• Systemic anticoagulation
Conservative therapy

Locations

Country	Name	City	State
United States	Banner University Medical Center	Tucson	Arizona

Sponsors (2)

Lead Sponsor	Collaborator
University of Arizona	Inari Medical

Country where clinical trial is conducted

United States, 

References & Publications (6)

Casazza F, Becattini C, Bongarzoni A, Cuccia C, Roncon L, Favretto G, Zonzin P, Pignataro L, Agnelli G. Clinical features and short term outcomes of patients with acute pulmonary embolism. The Italian Pulmonary Embolism Registry (IPER). Thromb Res. 2012 Dec;130(6):847-52. doi: 10.1016/j.thromres.2012.08.292. Epub 2012 Aug 24. — View Citation

Goldhaber SZ, Visani L, De Rosa M. Acute pulmonary embolism: clinical outcomes in the International Cooperative Pulmonary Embolism Registry (ICOPER). Lancet. 1999 Apr 24;353(9162):1386-9. — View Citation

Kahn SR, Akaberi A, Granton JT, Anderson DR, Wells PS, Rodger MA, Solymoss S, Kovacs MJ, Rudski L, Shimony A, Dennie C, Rush C, Hernandez P, Aaron SD, Hirsch AM. Quality of Life, Dyspnea, and Functional Exercise Capacity Following a First Episode of Pulmonary Embolism: Results of the ELOPE Cohort Study. Am J Med. 2017 Aug;130(8):990.e9-990.e21. doi: 10.1016/j.amjmed.2017.03.033. Epub 2017 Apr 8. — View Citation

Kahn SR, Hirsch AM, Akaberi A, Hernandez P, Anderson DR, Wells PS, Rodger MA, Solymoss S, Kovacs MJ, Rudski L, Shimony A, Dennie C, Rush C, Geerts WH, Aaron SD, Granton JT. Functional and Exercise Limitations After a First Episode of Pulmonary Embolism: Results of the ELOPE Prospective Cohort Study. Chest. 2017 May;151(5):1058-1068. doi: 10.1016/j.chest.2016.11.030. Epub 2016 Dec 6. — View Citation

Nijkeuter M, Hovens MM, Davidson BL, Huisman MV. Resolution of thromboemboli in patients with acute pulmonary embolism: a systematic review. Chest. 2006 Jan;129(1):192-7. Review. — View Citation

Piazza G, Goldhaber SZ. Chronic thromboembolic pulmonary hypertension. N Engl J Med. 2011 Jan 27;364(4):351-60. doi: 10.1056/NEJMra0910203. Review. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Ventilation-perfusion mismatch	Mismatch on ventilation-perfusion scintigraphy per Prospective Investigation of Pulmonary Embolism Diagnosis (PIOPED) criteria	6 months
Secondary	6-minute walk distance		30 days
Secondary	6-minute walk distance		6 months
Secondary	Hospital length of stay		Up to 30 days
Secondary	Dyspnea questionnaire		up to 72 hours
Secondary	Dyspnea questionnaire		30 days
Secondary	Dyspnea questionnaire		6 months
Secondary	Quality of life questionnaire		30 days
Secondary	Quality of life questionnaire		6 months