Chronic thromboembolic pulmonary hypertension (CTEPH) as a secondary form of pulmonary
hypertension is unique in its potential for remedial intervention. CTEPH is defined
by a mean pulmonary artery pressure >25 mm Hg in the setting of thrombotic pulmonary
vascular obstruction [
[1]
]. The disease occurs after preceding massive or recurrent pulmonary embolism in the
majority of patients but upwards of one-quarter of patients referred for surgical
management have no document history of a prior acute venous thromboembolic event [
[2]
]. In this review we will discuss the epidemiology and risk factors for the progression
from acute to chronic pulmonary embolism, and the development of CTEPH (Table 1).
Table 1Selected risk factors and univariate odds ratios for CTEPH.
Risk factor | Comparator | OR (95% CI) | Ref. |
---|---|---|---|
VA shunt | IPAH | 19.49 (2.47–2520) | [
[33]
] |
Splenectomy | IPAH | 22.09 (2.97–2824) | [
[33]
] |
Massive/submassive PE | IPAH | 13.03 (p = .004) | [
[18]
] |
VTE history | IPAH | 49.01 (p < .001) | [
[18]
] |
Recurrent VTE | IPAH | 45.02 (21.00–114.73) | [
[33]
] |
Thyroid replacement | IPAH | 5.41 (2.70–12.23) | [
[33]
] |
Hypothyroidism | Resolved PE | 4.3 (1.4–13.0) | [
[15]
] |
Prior VTE | IPAH | 19.36 (11.66–33.79) | [
[33]
] |
APS/lupus AC | IPAH | 3.28 (1.58–7.50) | [
[33]
] |
Non-blood group O | IPAH | 3.12 (p < .001) | [
[18]
] |
Malignancy | IPAH | 1.99 (1.01–4.26) | [
[33]
] |
Unprovoked PE | Resolved PE | 20.0 (2.7–>100) | [
[15]
] |
RV dysfunction at diagnosis | Resolved PE | 4.1 (1.4–12.0) | [
[15]
] |
Symptoms >2 weeks prior to PE diagnosis | Resolved PE | 7.9 (3.3–19.0) | [
[15]
] |
Age >60 years | Resolved PE | 2.9 (1.2–7.2) | [
[15]
] |
a Adjusted for age and sex.
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Article info
Publication history
Published online: January 08, 2018
Accepted:
January 7,
2018
Received in revised form:
January 5,
2018
Received:
May 3,
2017
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