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W. Frishman

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Review Aug 2026

Polycystic Ovary Syndrome and Cardiovascular Risk: Mechanisms, Clinical Evidence, and Prevention Strategies.

Polycystic ovary syndrome (PCOS) affects an estimated 11-13% of reproductive-age women worldwide and is increasingly recognized as a condition with significant cardiometabolic abnormalities, beyond its reproductive manifestations. This focused narrative review synthesizes contemporary evidence on the mechanistic, subclinical, and clinical links between PCOS and cardiovascular disease. We examine how hyperandrogenism may contribute to insulin resistance and related abnormalities, including dyslipidemia, hypertension, metabolic dysfunction-associated steatotic liver disease, and endothelial dysfunction, which collectively may increase atherosclerotic risk. Chronic low-grade inflammation and sympathetic overactivation are identified as additional, body mass index-independent amplifiers of this risk. Subclinical markers of vascular dysfunction, including increased carotid intima-media thickness, elevated coronary artery calcium, and elevated biomarkers such as asymmetric dimethylarginine and plasminogen activator inhibitor-1, are consistently elevated in women with PCOS relative to controls. A 2024 meta-analysis of over 300,000 women with PCOS demonstrates pooled odds ratios of 2.50 for myocardial infarction and 1.71 for stroke. Importantly, cardiovascular risk is not limited to women with elevated body mass index; lean women with PCOS carry a substantial and underappreciated metabolic burden. Current risk stratification tools inadequately account for PCOS, and cardiology guidelines have not yet formally designated PCOS as an atherosclerotic cardiovascular disease risk-enhancing condition. We review guideline-based cardiovascular risk assessment and interventions that improve cardiometabolic risk factors, including lifestyle modification, metformin, statins, and glucagon-like peptide-1 receptor agonists. Lastly, we identify priority areas for future research in this underserved population.

M. Moore, R. Hirani, Samy Khessib et al. · 0 citations
Review Sep 2026

Management of Patent Ductus Arteriosus in the Adult Population.

Patent ductus arteriosus (PDA) is defined as a persistent communication between the pulmonary artery and the aorta that normally closes before birth. While the ductus arteriosus is an essential vascular shunt for a developing fetus, its failure to close can become pathologic. Most PDAs are repaired during infancy; however, some remain patent into adulthood, with presentations varying in clinical severity. Untreated PDA can lead to significant morbidity, with complications including left-heart volume overload, arrhythmia, pulmonary hypertension, and possible Eisenmenger syndrome. This review covers the management of PDA in adults, highlighting the pathophysiology, morphological classification, clinical presentation, and current approaches to closure. Transcatheter closure is currently the preferred approach, although surgical methods may be used in patients with distinct anatomy or other concomitant intracardiac pathology. While both methods come with different risk profiles, closure in adults has proven to be effective, resulting in considerable hemodynamic and clinical improvements.

Anthony J. Kaywood, Alishah Ahmadi, W. Frishman · 0 citations
Review Aug 2026

Efficacy and Safety of Baxdrostat for Patients With Uncontrolled or Resistant Hypertension: A Systematic Review and Meta-Analysis.

We evaluated the efficacy and safety of baxdrostat in adults with uncontrolled or resistant hypertension. We searched PubMed, Scopus, Web of Science, and Cochrane CENTRAL from inception to January 2026. We included randomized controlled trials that involved hypertension patients with resistance type and compared baxdrostat versus placebo. The primary outcomes were the changes in mean seated systolic blood pressure and diastolic blood pressure. Secondary outcomes included changes in estimated glomerular filtration rate (eGFR), serum potassium, and serum aldosterone. Three randomized controlled trials were finally included, comprising 1264 patients were followed for 12-24 weeks. Compared with placebo, baxdrostat reduced seated systolic blood pressure by 8.62 mm Hg [mean difference (MD) = -8.62, 95% confidence interval (CI), -10.55 to -6.70, P < 0.001] and seated diastolic blood pressure by 3.55 mm Hg (MD = -3.55, 95% CI, -4.81 to -2.28, P < 0.001). Baxdrostat lowered serum aldosterone by 4.03 ng/dL, reduced eGFR by 5.49 mL/min/1.73 m2, and increased serum potassium by 0.39 mmol/L. However, baxdrostat was associated with higher adverse events compared with the placebo. Baxdrostat lowers blood pressure and aldosterone levels in uncontrolled and resistant hypertension but increases potassium and modestly reduces eGFR, supporting careful laboratory monitoring and longer trials to evaluate long-term clinical outcomes.

A. Gadelmawla, A. W. Hageen, R. Rateb et al. · 0 citations
Aug 2026

Patent Ductus Arteriosus.

Patent ductus arteriosus (PDA) is a common congenital heart defect. PDA disproportionately affects low-birth-weight infants, resulting in an incidence of 21% among preterm births as compared to 0.05% in the general population. The ductus arteriosus remains patent in the fetus, allowing maternal blood to directly enter fetal systemic circulation, bypassing the fetal lungs. This is mediated through the mechanisms of nitric oxide and prostaglandins. At birth, increased partial pressure and decreased prostaglandin levels facilitate functional closure of the ductus arteriosus. Further migration of contractile smooth muscle cells and tissue remodeling results in fibrosis and anatomical closure of the ductus. Underdevelopment of contractile smooth muscle cells, the intimal layer in blood vessels, and vasa vasorum have been theorized as the mechanisms behind PDA in preterm-birth neonates. PDA creates a left-to-right shunt, sending oxygenated blood from the aorta to the lungs via the pulmonary artery, often manifesting with symptoms of pulmonary hypertension and edema. As the symptoms progress, the shunt is often reversed, resulting in cyanosis in a condition known as Eisenmenger syndrome. While most affected patients present with distinguishing clinical findings, many also remain asymptomatic, and the defect goes undetected for years.

Rithvik Swamynathan, L. Dolan, W. Frishman et al. · 0 citations
Aug 2026

Updates on Imaging Modalities for the Diagnosis of Aortic Stenosis.

Integration of echocardiography, computed tomography, CMR, and emerging positron emission tomography and artificial intelligence-based approaches can help address diagnostic uncertainty in aortic stenosis.

H. Itani, M. Moumneh, Ahmed A. Zayed et al. · 0 citations

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