Precapillary (PrPH) and combined pre and postcapillary pulmonary hypertension (CoPH) increase all-cause and cardiovascular mortality risk in patients undergoing TAVI for severe symptomatic aortic stenosis. Since pulmonary artery (PA) diameter adapts to increased pulmonary artery pressure, this study evaluates the cor- relation between CT-derived main PA (MPA), right PA (RPA), left PA (LPA) diameters, and the MPA/ascending aorta (AA) ratio with PH subtypes defined by right heart catheterization (RHC), as well as their prognostic impact. This retrospective study includes all consecutive patients undergoing TAVR between June 2007 to December 2022 with pre-TAVI RHC and ECG-gated CT scans. The primary endpoint was all-cause mortality. Mean follow-up time was 5 years. Among 638 consecutive patients, 329 (51%) had normal mPAP, while 309 (49%) had PH. Of these, 143 (46%) had isolated postcapillary PH (IpcPH), and 166 (54%) had CoPH. Patients with PrPH were excluded. CoPH patients had higher PAP than both IpcPH and no-PH groups. In univariable and multivariable analysis, MPA, MPA index (MPAi), RPA, RPA index (RPAi), MPA/AA, MPAi/AA, and RPA/LPA correlated with PH, while MPA, MPAi, RPA, RPAi, MPA/AA, and MPAi/AA were associated with CoPH. The best AUC for PH discrimination was MPAi (AUC = 0.71, cutoff = 16 mm/m2, sensitivity = 66%, specificity = 72%), while MPA/AA best discriminated CoPH (AUC = 0.73, cutoff = 0.88, sensitivity = 67%, specificity = 72%). Patients with PA/AA <0.88 had significantly lower 5-year mortality after TAVI than those with PA/AA ≥0.88 (log-rank p = 0.046, HR 1.39). In conclusion, Increase in MPA/AA CT-derived ratio is predictive of Combined PH, highlighting patients who could benefit from a RHC in term of CV stratification before TAVI.
L’ipertensione polmonare precapillare (PrPH) e quella combinata pre- e postcapillare (CoPH) aumentano il rischio di mortalità per tutte le cause e cardiovascolare nei pazienti sottoposti a TAVI per stenosi aortica severa sintomatica. Poiché il diametro dell’arteria polmonare (PA) si adatta all’aumento della pressione arteriosa polmonare, questo studio valuta la correlazione tra i diametri dell’arteria polmonare principale (MPA), dell’arteria polmonare destra (RPA) e sinistra (LPA), e il rapporto MPA/aorta ascendente (AA), derivati da TC, con i sottotipi di ipertensione polmonare (PH) definiti tramite cateterismo cardiaco destro (RHC), nonché il loro impatto prognostico. Si tratta di uno studio retrospettivo che include tutti i pazienti consecutivi sottoposti a TAVR tra giugno 2007 e dicembre 2022 con RHC pre-TAVI e TC sincronizzata con ECG. L’endpoint primario era la mortalità per tutte le cause. Il tempo medio di follow-up è stato di 5 anni. Tra 638 pazienti consecutivi, 329 (51%) presentavano una pressione arteriosa polmonare media (mPAP) normale, mentre 309 (49%) avevano PH. Di questi ultimi, 143 (46%) avevano ipertensione polmonare postcapillare isolata (IpcPH) e 166 (54%) presentavano CoPH. I pazienti con PrPH sono stati esclusi. I soggetti con CoPH mostravano valori di PAP più elevati rispetto ai gruppi con IpcPH e senza PH. Nell’analisi univariata e multivariata, i parametri MPA, indice MPA (MPAi), RPA, indice RPA (RPAi), MPA/AA, MPAi/AA e RPA/LPA sono risultati correlati con la presenza di PH, mentre MPA, MPAi, RPA, RPAi, MPA/AA e MPAi/AA erano associati specificamente con CoPH. Il miglior valore predittivo (AUC) per la discriminazione della PH è stato ottenuto con MPAi (AUC = 0,71; cutoff = 16 mm/m²; sensibilità = 66%; specificità = 72%), mentre MPA/AA ha mostrato la miglior capacità discriminante per CoPH (AUC = 0,73; cutoff = 0,88; sensibilità = 67%; specificità = 72%). I pazienti con rapporto PA/AA < 0,88 hanno presentato una mortalità a 5 anni significativamente inferiore dopo TAVI rispetto a quelli con PA/AA ≥ 0,88 (log-rank p = 0,046; HR 1,39). In conclusione, un aumento del rapporto MPA/AA derivato da TC è predittivo di ipertensione polmonare combinata (CoPH), identificando pazienti che potrebbero beneficiare di un RHC ai fini della stratificazione cardiovascolare pre-TAVI.
La tomografia computerizzata predice l’ipertensione polmonare combinata e l'outcome nei pazienti con stenosi valvolare aortica severa sottoposti a TAVI
PUTORTI', FRANCESCO
2023/2024
Abstract
Precapillary (PrPH) and combined pre and postcapillary pulmonary hypertension (CoPH) increase all-cause and cardiovascular mortality risk in patients undergoing TAVI for severe symptomatic aortic stenosis. Since pulmonary artery (PA) diameter adapts to increased pulmonary artery pressure, this study evaluates the cor- relation between CT-derived main PA (MPA), right PA (RPA), left PA (LPA) diameters, and the MPA/ascending aorta (AA) ratio with PH subtypes defined by right heart catheterization (RHC), as well as their prognostic impact. This retrospective study includes all consecutive patients undergoing TAVR between June 2007 to December 2022 with pre-TAVI RHC and ECG-gated CT scans. The primary endpoint was all-cause mortality. Mean follow-up time was 5 years. Among 638 consecutive patients, 329 (51%) had normal mPAP, while 309 (49%) had PH. Of these, 143 (46%) had isolated postcapillary PH (IpcPH), and 166 (54%) had CoPH. Patients with PrPH were excluded. CoPH patients had higher PAP than both IpcPH and no-PH groups. In univariable and multivariable analysis, MPA, MPA index (MPAi), RPA, RPA index (RPAi), MPA/AA, MPAi/AA, and RPA/LPA correlated with PH, while MPA, MPAi, RPA, RPAi, MPA/AA, and MPAi/AA were associated with CoPH. The best AUC for PH discrimination was MPAi (AUC = 0.71, cutoff = 16 mm/m2, sensitivity = 66%, specificity = 72%), while MPA/AA best discriminated CoPH (AUC = 0.73, cutoff = 0.88, sensitivity = 67%, specificity = 72%). Patients with PA/AA <0.88 had significantly lower 5-year mortality after TAVI than those with PA/AA ≥0.88 (log-rank p = 0.046, HR 1.39). In conclusion, Increase in MPA/AA CT-derived ratio is predictive of Combined PH, highlighting patients who could benefit from a RHC in term of CV stratification before TAVI.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/97209