Article Figures & Data
Figures
- FIGURE 1.
Reading scheme reporting anatomic distribution of lung segments. Right lung (1–10): upper lobe (apical [1]; posterior [2]; anterior [3]); middle lobe (lateral [4]; medial [5]); lower lobe (superior [6]; medial-basal [7; 7 is not shown in the figure because the anterior medial segment could only be visualized on the oblique anterior projection, which is not used in this article]; posterior-basal [8]; lateral-basal [9]; anterior-basal [10]). Left lung (11–18): upper lobe (apical-posterior [11]; anterior [12]); lingula (superior [13]; inferior [14]); lower lobe (superior [15]; medial-basal [16]; lateral-basal [17]; posterior-basal [18]). ANT = anterior; POST = posterior; R LAT = right lateral; L LAT = left lateral; RPO = right posterior oblique; LPO = left posterior oblique.
- FIGURE 2.
Values of PD score at different follow-up times. ***P < 0.001.
- FIGURE 3.
Changes in PD and hyperperfusion in 6 different views: anterior and posterior (top), right and left lateral (middle), and right and left posterior oblique (bottom). (A) Baseline PLS at acute PE shows several segmental PDs and shift of perfusion from posterior–inferior to anterior–superior lung regions (hyperperfusion) (PD score = 5.5, hyperperfusion in upper and middle lobes). (B) PLS 6 mo later shows marked improvement (PD score = 1.0, hyperperfusion in upper and middle lobes).
- FIGURE 4.
Values of PA-aO2 (A) and PAsP (B) at different follow-up times. **P < 0.01. ***P < 0.001.
- FIGURE 5.
Suggested practical use of PLS in follow-up of acute PE. PH = pulmonary hypertension. Red boxes indicate suggested follow-up controls.
Tables
Characteristic Data Mean age ± SD (y) 68.56 ± 13.82 Male 79 (43.2) Deep-vein thrombosis 69 (37.7) Previous venous thromboembolism 15 (8.2) Cardiovascular disease 104 (56.8) Chronic obstructive pulmonary disease 29 (15.8) Cancer-associated PE 33 (18.0) Transient provoked PE 48 (26.2) Unprovoked PE 102 (55.7) Data are n followed by percentage in parentheses, except for age.
Correlation Baseline 1 wk 1 mo 6 mo 1 y PD vs. PA-aO2 0.29 (P < 0.001) 0.19 (P < 0.05) 0.24 (P < 0.05) 0.20 (P < 0.05) 0.34 (P < 0.0001) PD vs. PAsP 0.04 (P = 0.68) — — 0.36 (P < 0.001) 0.25 (P < 0.05) Recovery at 1 mo Recovery at 6 mo Variable Incomplete Complete P Incomplete Complete P Male 45 (46.9) 30 (37.0) 0.187 32 (50.8) 38 (40.9) 0.221 Age (y) 70.7 ± 13.6 65.6 ± 13.9 <0.05 73.2 ± 11.2 65.5 ± 14.2 <0.001 Cardiovascular disease 54 (56.3) 46 (56.8) 0.942 41 (65.1) 54 (58.1) 0.378 Chronic obstructive pulmonary disease 19 (19.8) 9 (11.1) 0.115 16 (25.4) 11 (11.8) 0.028 Deep-vein thrombosis 41 (42.7) 28 (34.6) 0.269 25 (39.7) 36 (38.7) 0.903 Active cancer 13 (13.5) 17 (20.9) 0.188 8 (12.7%) 19 (20.4) 0.210 Unprovoked PE 65 (67.7) 35 (43.2) <0.05 44 (69.8) 46 (49.5) <0.05 Transient provoked PE 18 (18.8) 29 (35.8) <0.05 11 (17.5) 28 (30.1) 0.073 PD at baseline 9.6 ± 4.2 6.9 ± 4.2 <0.0001 9.9 ± 4.1 6.9 ± 4.3 <0.0001 1-wk percent recovery (%) 30.0 ± 30.7 70.9 ± 27.9 <0.001 28.9 ± 27.4 64.9 ± 29.8 <0.001 PA-aO2 at baseline (mm Hg) 52.7 ± 27.6 49.4 ± 37.9 0.717 50.1 ± 28.6 49.9 ± 37.5 0.978 PAsP at baseline (mm Hg) 47.7 ± 10.1 43.9 ± 9.6 <0.05 48.8 ± 10.4 44.9 ± 10.3 0.05 Univariate analysis: P < 0.05 was considered significant. Qualitative data are expressed as numbers followed by percentages in parentheses; continuous data are expressed as mean ± SD.
1 mo 6 mo Variable Odds ratio P Odds ratio P PD baseline 0.84 (0.76–0.92) <0.0001 0.80 (0.72–0.89) <0.0001 1-wk percent recovery 1.05 (1.03–1.06) <0.0001 1.04 (1.02–1.05) <0.0001 Unprovoked PE 2.90 (1.26–6.69) <0.05 — — Age — — 0.97 (0.93–0.99) 0.046 Multivariate analysis: P < 0.05 was considered significant. Data in parentheses are 95% confidence intervals.
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