Causes of pulmonary hypertension in the elderly.
BACKGROUND
Pulmonary hypertension (PH) is common in elderly patients, but a detailed analysis of the causes of PH in the elderly has not been performed. We hypothesized that pulmonary arterial hypertension (PAH) is rare in elderly patients and sought to describe the characteristics of these patients at a large referral center.


METHODS
Clinical and hemodynamic data were collected on consecutive patients ≥ 65 years of age referred for evaluation of PH. The subtype of PH was determined after standard evaluation using the World Health Organization (WHO) classification. Patients with PH not meeting criteria for PAH with "out-of-proportion" PH related to group 2 or group 3 disease were classified as "other/mixed PH." A model using age, presence of connective tissue disease, and left atrial size was developed to predict the probability of PAH diagnosis.


RESULTS
Two hundred forty-six elderly patients were evaluated (mean age, 72.9 ± 5.5 years, 78% women); 36 had PAH (15%). Idiopathic PAH was rare (four patients, 1.6%). WHO group 2 PH was the most frequent diagnosis (n = 70, 28% of cohort); mixed/other PH (n = 43, 17%) and WHO group 3 PH (n = 34, 14%) were also common diagnoses. Connective tissue disease strongly predicted PAH diagnosis (OR, 27.2; 95% CI, 9.5-77.6).


CONCLUSIONS
PAH is an uncommon cause of PH in elderly patients, most frequently associated with connective tissue disease. WHO group 2 PH and mixed disease are common, highlighting a need for careful phenotyping of elderly patients with PH prior to initiating PAH therapy.
Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN. Electronic address: meredith.e.pugh@vanderbilt.edu.
Meredith E
ME
Pugh
Vanderbilt University School of Medicine, Nashville, TN.
Lakshmi
L
Sivarajan
Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN.
Li
L
Wang
Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN.
Ivan M
IM
Robbins
Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN.
John H
JH
Newman
Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN.
Anna R
AR
Hemnes
D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology; D015994:Incidence; D008297:Male; D011669:Pulmonary Wedge Pressure / Q000502:physiology*; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D014481:United States / Q000453:epidemiology