We investigated the association between blood pressure (BP) and the risk of cardiovascular disease (CVD) in individuals with non-proteinuric chronic kidney disease (CKD) without diabetes. Using a large-scale nationwide administrative claims and health checkup database in Japan, we identified 287,238 non-diabetic adults with an estimated glomerular filtration rate <60 mL/min/1.73 m2 and negative/trace proteinuria. We examined the association between BP and CVD events by modeling BP both as a continuous variable and as a categorical variable according to the 2017 ACC/AHA guideline classification. The primary outcome was a composite of myocardial infarction, stroke, heart failure, and atrial fibrillation. Multivariable Cox regression analyses showed that higher systolic BP (SBP) was associated with increased CVD risk (hazard ratio [HR] 1.05 per 10 mmHg; 95% CI 1.04-1.05). Compared with normal BP, the HRs were 1.03 (95% CI 1.00-1.07) for elevated BP, 1.08 (1.05-1.11) for stage 1 hypertension, and 1.20 (1.17-1.24) for stage 2 hypertension. Restricted cubic spline analysis showed an increase in CVD risk at SBP levels above ~130 mmHg. However, among individuals receiving antihypertensive medication, a U-shaped association was observed, with an increased risk also evident at SBP levels below ~130 mmHg. In individuals with non-proteinuric CKD without diabetes, higher SBP was positively associated with increased cardiovascular risk. However, a U-shaped association observed among individuals receiving antihypertensive treatment suggests that the relationship between BP and cardiovascular risk may be complex in this population, highlighting the potential importance of individualized clinical assessment.
Yuta Suzuki, Masachika Nishikawa, Hidehiro Kaneko et al.· Hypertension Research· 0 citations
BACKGROUND
Atrial fibrillation (AF) is associated with diverse histological abnormalities, but their contributions to atrial dysfunction and functional recovery remain unclear.
METHODS
In a discovery cohort of 375 patients with nonvalvular AF undergoing catheter ablation, atrial biopsy samples were quantitatively analyzed for fibrosis, intercellular space expansion, myofibrillar loss, myocardial nuclear density, and amyloid deposition. Left atrial reservoir strain (LASr) was assessed as a measure of atrial function during sinus rhythm (Group 1) or AF (Group 2) at the time of echocardiography. Functional recovery was defined as the change in LASr 12 months after ablation. Findings were validated in an independent cohort of 191 patients with AF. A subset of samples was additionally analyzed for DNA damage markers, poly(ADP-ribose), and phosphorylated histone H2A.X.
RESULTS
LASr improved significantly after ablation in Group 2 but not in Group 1. Multivariable analyses identified greater fibrosis, reduced myocardial nuclear density, and advanced amyloid deposition as significant determinants of impaired atrial function in both groups and of limited postablation functional recovery in Group 2 (all P<0.01). Amyloid deposition was also significantly associated with adverse clinical outcomes. Decision-tree models incorporating LASr accurately identified advanced amyloid deposition in both cohorts (accuracy, 94%-96%). DNA damage markers were inversely associated with myocardial nuclear density and positively associated with cardiomyocyte hypertrophy.
CONCLUSIONS
Fibrosis, DNA damage-associated reduction in myocardial nuclear density, and advanced atrial amyloidosis are key determinants of atrial dysfunction and impaired postablation functional recovery in patients with AF. LASr enables noninvasive identification of advanced atrial amyloidosis.
Yuya Takahashi, T. Yamaguchi, Kana Nakashima et al.· Journal of the American Hear...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
