Muhammad Shahzeb Khan1, Emaan Amin2, Muhammad Mustafa Memon2, Naser Yamani3, Tariq Jamal Siddiqi2, Safi U Khan4, Mohammad Hassan Murad5, Farouk Mookadam6, Vincent M Figueredo7, Rami Doukky8, Raymond L Benza9, Richard A Krasuski10. 1. Department of Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, IL, USA. Electronic address: shahzebkhan@gmail.com. 2. Department of Internal Medicine, Dow University of Health Sciences, Karachi, Pakistan. 3. Department of Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, IL, USA. 4. Department of Internal Medicine, Robert Packer Hospital, Sayre, PA, USA. 5. Evidence-based Practice Center, Mayo Clinic, Rochester, MN, USA. 6. Department of Cardiovascular Diseases, Mayo Clinic, Scottsdale, AZ, USA. 7. Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA, USA. 8. Division of Cardiology, Cook County Health and Hospitals System, Chicago, IL, USA. 9. Cardiovascular Institute, Allegheny Health Network, Pittsburgh, PA, USA. 10. Department of Cardiovascular Medicine, Duke University Health System, Durham, NC, USA.
Abstract
BACKGROUND: Current guidelines give balloon pulmonary angioplasty (BPA) a Class IIb recommendation for use in inoperable chronic thromboembolic pulmonary hypertension (CTEPH), as its safety and efficacy remain poorly defined. We conducted a systematic review and meta-analysis to evaluate BPA effectiveness. METHODS: Medline, Cochrane Library and Scopus were searched for original studies from database inception dates until 24th May 2018. Prospective studies reporting outcomes before and after BPA in inoperable CTEPH patients were included. Studies with <20 patients were excluded. Data were pooled using a random effects model represented as weighted mean differences with 95% confidence intervals (CIs). RESULTS: Seventeen noncomparative studies comprising 670 CTEPH patients (mean age 62 years; 68% women) were included. Meta-analysis showed significantly decreased mean pulmonary artery pressure (-14.2 mm Hg [95% CI -18.9, -9.5]), pulmonary vascular resistance (-303.5 dyn·s/cm5 [95% CI -377.6, -229.4]) and mean right atrial pressure (-2.7 mm Hg [95% CI -4.1, -1.3]) after BPA. Six-minute walk distance (67.3 m [95% CI 53.8, 80.8]) and cardiac output (0.2 l/min [95% CI 0.0, 0.3]) were significantly increased following BPA. From 12 studies reporting mortality with median follow-up of 9 months after BPA (range, 1-51 months), pooled incidence of short (≤1 month) and long-term mortality (>1 month) was 1.9% and 5.7%, respectively. CONCLUSION: This systematic review and meta-analysis suggests mildly improved hemodynamics and overall low mortality rates following BPA in inoperable CTEPH patients. This non-comparative evidence can be used to facilitate decision making until the results of larger, controlled studies become available.
BACKGROUND: Current guidelines give balloon pulmonary angioplasty (BPA) a Class IIb recommendation for use in inoperable chronic thromboembolic pulmonary hypertension (CTEPH), as its safety and efficacy remain poorly defined. We conducted a systematic review and meta-analysis to evaluate BPA effectiveness. METHODS: Medline, Cochrane Library and Scopus were searched for original studies from database inception dates until 24th May 2018. Prospective studies reporting outcomes before and after BPA in inoperable CTEPHpatients were included. Studies with <20 patients were excluded. Data were pooled using a random effects model represented as weighted mean differences with 95% confidence intervals (CIs). RESULTS: Seventeen noncomparative studies comprising 670 CTEPHpatients (mean age 62 years; 68% women) were included. Meta-analysis showed significantly decreased mean pulmonary artery pressure (-14.2 mm Hg [95% CI -18.9, -9.5]), pulmonary vascular resistance (-303.5 dyn·s/cm5 [95% CI -377.6, -229.4]) and mean right atrial pressure (-2.7 mm Hg [95% CI -4.1, -1.3]) after BPA. Six-minute walk distance (67.3 m [95% CI 53.8, 80.8]) and cardiac output (0.2 l/min [95% CI 0.0, 0.3]) were significantly increased following BPA. From 12 studies reporting mortality with median follow-up of 9 months after BPA (range, 1-51 months), pooled incidence of short (≤1 month) and long-term mortality (>1 month) was 1.9% and 5.7%, respectively. CONCLUSION: This systematic review and meta-analysis suggests mildly improved hemodynamics and overall low mortality rates following BPA in inoperable CTEPHpatients. This non-comparative evidence can be used to facilitate decision making until the results of larger, controlled studies become available.
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