Slide 41 -
|
Diagnostic Evaluation of Pulmonary Arterial Hypertension: ACCP Guidelines Lewis J. Rubin, MD, FCCP, FRCP
University of California, San Diego
Disclosures Investigator and Consultant
Actelion, Pfizer, CoTherix, Myogen, Schering, United Therapeutics, Mondobiotech, Nitrox
Members of the ACCP Guidelines Committee Lewis Rubin, MD, FCCP, Chair
University of California, San Diego
Steven H. Abman, MD
University of Colorado
Gregory S. Ahearn, MD
Duke University
Rino Aldrighetti, PHA Rep
Pulmonary Hypertension Association
Charles Atwood, MD, FCCP
University of Pittsburgh
David B. Badesch, MD, FCCP
University of Colorado
Robyn J. Barst, MD, FCCP
Columbia University
Richard N. Channick, MD, FCCP
University of California, San Diego
John Conte, MD, FCCP
Johns Hopkins University
Ramona L. Doyle, MD, FCCP
Stanford University
Terry A. Fortin, MD
Duke University
Joe G. N. Garcia, MD, FCCP
Johns Hopkins University
Joseph A. Govert, MD, FCCP
Duke University
David Gutterman, MD, FCCP
Medical College of Wisconsin
Sandra Zelman Lewis, PhD
American College of Chest Physicians
James E. Loyd, MD, FCCP
Vanderbilt University
Douglas C. McCrory, MD, MHS
Duke University
Michael D. McGoon, MD, FCCP
Mayo Clinic
Vallerie V. McLaughlin, MD, FCCP
University of Michigan
Kenneth Presberg, MD, FCCP
Medical College of Wisconsin
Stuart Rich, MD, FCCP, ACC Rep
Rush Presbyterian St. Luke’s Hospital
Gerald Simonneau, MD
Hospital Antoine Beclere
Virginia Steen, MD
Georgetown University
John Sundy, MD
Duke University
Fredrick M. Wigley, MD, ACR Rep
Johns Hopkins University
Organizational Endorsements American College of Chest Physicians
American College of Cardiology
American College of Rheumatology
American Heart Association
Pulmonary Hypertension Association Cardiac Catheterization RA mean 10 mm Hg
RV 100/14 mm Hg
PA 100/40 (mean 60) mm Hg
PCW mean 12 mm Hg
LV 110/0-10 mm Hg
Ao 110/70 (mean 83) mm Hg
Cardiac Output 3.0 L/min
Room Air SaO2 82%; SvO2 50%
PVR 20 Units
No acute response to iNO Echocardiogram also demonstrated no intracardiac shunt After 1 month of continuous intravenous epoprostenol therapy Baseline HRCT Baseline PFTs (% Predicted)
FVC 80%
FEV1 80%
TLC 76%
DLCO 22% Arterial Blood Gases
Room Air: pH 7.46
PCO2 32
PO2 51
100% O2: PO2 67
What Would YOU Do? Begin oral therapy (either sildenafil or bosentan), and warfarin
Begin therapy with epoprostenol
Begin therapy with inhaled iloprost
Do something else What was Done She was started on continuous intravenous epoprostenol and initially improved, with less dyspnea.
The dose of epoprostenol was gradually increased from 2-12 ng/kg/min
She returned 1 month later with the complaint of increased dyspnea.
SaO2 was 74% After 1 month of continuous intravenous epoprostenol therapy Before continuous intravenous epoprostenol therapy What Would YOU Do? Add oral therapy (either sildenafil or bosentan)
Increase epoprostenol dose after diuresis
Discontinue epoprostenol and switch to another therapy
Refer for a thoracoscopic lung biopsy
Do something else What was Done She was switched to inhaled prostanoid therapy
She stabilized but remained hypoxemic and her activity tolerance was severely impaired
She underwent lung transplantation 6 months later
What’s the Diagnosis? Pulmonary Arterial HypertensionDiagnostic classificationJACC 2004 and Chest 2004 Suspected Pulmonary Hypertension Echocardiogram Chest X-Ray PFT’s Sleep
Study Ventilation-
Perfusion scan,
angiography Autoantibody
tests HIV test LFTs and clinical
evidence of cirrhosis
and portal htn Left heart disease
Valvular/Congenital
Heart Disease Emphysema
Fibrosis
Thoracic abnl Sleep
disorder Chronic
Thrombo-
embolism Scleroderma
SLE
RA
Vasculitis HIV infection Portopulmonary
Hypertension Diagnosis of Pulmonary Hypertension Required When Clinically Indicated Echocardiographic Appearance of PAH Tricuspid Regurgitant Jet Velocity Measurements from the echocardiogram in pulmonary hypertension, including the peak velocity of the regurgitant jet of the tricuspid valve Arcasoy et al: AJRCCM 2003; 167: 735-740 Mukerjee et al: Rheumatology 2004; 43: 461-466 The Chest X-ray Normal Right Heart Enlargement HRCT: Ground Glass or Septal Lines? CT AngiogramMosaic Pattern Perfusion Lung Scan CT AngiogramCentral Thrombus Hypoperfusion Hypoperfusion Abrupt
cut-off Filling
defect Web Pulmonary Angiography PTE:
The Procedure PTE Specimen Hemodynamics – NIH Registry 4 Frequency Right Atrial Pressure (mm Hg) 30 20 10 0 8 12 16 20 24 28 10 40 50 30 Frequency Pulmonary Vascular Resistance Index(L/Min/M2) 25 20 15 10 0 30 70 80 5 20 60 90 Hemodynamic Abnormalitiesand Prognosis D'Alonzo et al. Annals Int Med 1991;115:343-349 Mean PAP 0 10 20 30 40 50 Median survival (months) Mean RAP Mean CI < 55 mmHg 85 mmHg < 10 mmHg 20 mmHg 4 L/min/m2 < 2 L/min/m2 Acute Testing of Vasoreactivity Goal is to determine whether oral vasodilator therapy may be worthwhile as first-line approach
Testing should be performed in experienced setting with short-acting agent (ie, NO, PGI2, Adenosine)
Few patients who do not have PPH will respond Definition of “Responder” Reduction of Pam to < 40 mm Hg:
With a >10% fall in Pam
And a normal CO
Without change in SAPm
PVR should be < 6 units JACC 2004: Proceedings of the Third World Symposium
Chest 2004: ACCP Evidence-Based Guidelines CCB Response Rates in PAH Lee SH and Rubin LJ: J Intern Med 2005; 258: 199-215.
Sitbon O et al: Circulation 2005; 111: 3105-3111. ACCP PAH GuidelinesPredictors of Poor Survival Advanced Functional Class (A)
Poor Exercise Endurance (6MWT) (A)
Presence of a Pericardial Effusion (A)
Elevated Mean Right Atrial Pressure (A)
Reduced Cardiac Index (A) McLaughlin VV et al. CHEST, 2004 ACCP PAH GuidelinesPredictors of Poor Survival Elevated Mean Pulmonary Artery Pressure (B)
Elevated Tei index (C)
Low VO2 max, peak SBP, DBP on CPET (C)
ECG findings of RAE, RVE (C)
Elevated BNP (C) McLaughlin VV et al. CHEST, 2004 Historical Mortality inClass III / IV PPH Days Percent survival 0 0 300 600 900 1200 1500 20 40 60 80 100 Class II & IIIClass IV Echo/Doppler endpoints Effusion score
RA area RVET (Tei Index)
RV EF (surrogate) Mitral valve early filling
LV diastolic dimensions Survival correlates with BNP values in PPH Nagaya N et al. Circulation 2000;102:865-70. 100 80 0 Survival rate (%) 60 40 20 0 12 24 36 48 Time (months) 0 100 80 60 40 20 0 Baseline BNP Follow-up BNP 12 24 36 48 Time (months) BNP < 180 pg/ml BNP 180 pg/ml BNP < 150 pg/ml BNP 150 pg/ml McLaughlin, Circulation 2002 NYHA Functional Class Remains an
Important Determinant of Survival in PPH Influence of 6 Minute Walk on Survival in PPH Sitbon et al, JACC 2002: 40: 780-788
|