Prognostic value of age adjusted segment involvement score as measured by coronary computed tomography: a potential marker of vascular age

[Vascular age in a sample of general population of the sanitary area of Toledo (Spain). RICARTO study]

OBJECTIVE

To know the vascular age (VA) of a sample of general population included in the RICARTO study.

PATIENTS AND METHOD

Epidemiological study of the general population aged ≥18 from the Health Area of Toledo, based on the health card database. VA was calculated from the absolute cardiovascular risk (CVR) estimated with the Framingham and SCORE equations (type2 diabetes increased CVR in SCORE 2-fold in men and 4-fold in women). Patients with cardiovascular or renal disease were excluded. An ANCOVA analysis was conducted to adjust and compare the mean of VA by age and sex.

RESULTS

1,496 subjects (53.54% women) were analyzed. Mean (SD) age was 48.77 (14.89) years old and. Mean VA was 51.37 (19.13) with Framingham equation and 57.09 (17.63) years old with SCORE equation. VA was significantly higher in men, low education level, arterial hypertension, dyslipidemia, hypertriglyceridemia, diabetes mellitus, abdominal obesity, general obesity, smoking and in individuals with 5CVR factors vs none (P<.001 in all). Higher differences (Cohen's D >0.5) were found in non-diabetic vs diabetic people (1.58 Framingham; 2.44 SCORE), normotensive vs hypertensive subjects (1.64 Framingham; 1.19 SCORE), and non-dyslipidemia vs presence of dyslipidemia (0.95 Framingham; 0.66 SCORE).

CONCLUSIONS

VA of our sample is two and a half years older than chronological one with Framingham equation and more than eight years with SCORE equation. Control of CVR factors is the key to get a VA closer to real and to obtain a better cardiovascular health in the population.

Added prognostic value of plaque burden to computed tomography angiography and myocardial perfusion imaging

BACKGROUND AND AIMS

Cardiac computed tomographic angiography (CCTA) - derived measures of coronary artery disease (CAD) burden have been shown to independently predict incident cardiovascular events. We aimed to compare the added prognostic value of plaque burden to CCTA anatomic assessment and single photon emission computed tomography (SPECT) physiologic assessment in a cohort with high prevalence of risk factors undergoing both tests.

METHODS

Consecutive patients who underwent clinically indicated CCTA and SPECT myocardial imaging for suspected CAD were included. Stenosis severity and segment involvement score (SIS - number of segments with plaque irrespective of stenosis) were determined from CCTA, and presence of ischemia was determined from SPECT. Patients were followed for major adverse cardiovascular events (MACE, inclusive of all-cause death, non-fatal myocardial infarction, and percutaneous coronary intervention or coronary artery bypass grafting 90-days after imaging test.) RESULTS: A total of 956 patients were included (mean age 61.1 ± 14.2 years, 54% men, 89% hypertension, 81% diabetes, 84% dyslipidemia). Obstructive stenosis (left main ≥50%, all other coronary segments ≥70%) and ischemia were observed in a similar number of patients (14%). In multivariable Cox regression models, SIS significantly predicted outcomes and improved risk discrimination in models with CCTA obstructive stenosis (HR 1.15, p ≤ 0.001; Harrel's C 0.74, p = 0.008) and SPECT ischemia (HR 1.14, p < 0.001; Harrel's C 0.76, p = 0.019).

CONCLUSIONS

Our results suggest that in patients with suspected CAD and a high prevalence of risk-factors, plaque burden adds incremental prognostic value over established CCTA and SPECT measures to predict incident cardiovascular outcomes.

Chemoradiation therapy for non-small cell lung cancer exacerbates thoracic aortic calcification determined by computed tomography

Preoperative chemoradiation therapy (CRT) has been considered as an effective treatment for non-small cell lung cancer. However, there is concern that CRT progresses atherosclerosis in cancer survivors. This study sought to determine if preoperative CRT exacerbated thoracic aortic calcification (TAC) detected by computed tomography (CT) in patients with lung cancer. Among 473 patients who underwent surgery for lung cancer at Okayama University Hospital between 2011 and 2015, 34 patients undergoing preoperative CRT and surgery (CRT group) and 33 matched patients undergoing initial surgery (non-CRT group) were analyzed and compared. The volume of TAC between the 2nd and 12th thoracic vertebrae was quantitatively measured by CT at baseline and 1-year follow-up. Patients in the CRT group (62 ± 7 years old, 74% male) received cisplatin chemotherapy with docetaxel or vinorelbine and radiation therapy (mean 47.3 ± 4.0 Gy). The percent change in TAC volume was significantly greater in the CRT compared with the non-CRT group (58.7%, 95% confidence interval [CI] 41.7-75.7% vs. 27.2%, 95% CI 9.9-44.4%; p = 0.01). Multivariate logistic regression analysis identified CRT as an independent factor associated with greater TAC progression (> the median value) (odds ratio 3.63, 95% CI 1.19-11.08; p = 0.02). In conclusion, preoperative CRT for lung cancer exacerbates TAC. Follow-up of such patients should thus include careful longitudinal assessment for cardiovascular disease.