{"title":"Familial Hypercholesterolemia.","authors":"Iulia Iatan, Jacques Genest","doi":"10.14797/mdcvj.1860","DOIUrl":"10.14797/mdcvj.1860","url":null,"abstract":"<p><p>Familial hypercholesterolemia (FH) is a semi-dominant, autosomal, monogenic lipoprotein disorder characterized by severe elevations in low-density lipoprotein cholesterol (LDL-C) and premature atherosclerotic cardiovascular disease (ASCVD). The most common form, heterozygous FH, has an estimated prevalence of approximately 1 per 311 individuals, making it one of the most common hereditary disorders in medicine. FH is caused by pathogenic variants in the LDL receptor (<i>LDLR</i>) gene, or in genes encoding proteins involved in receptor-mediated LDL particle uptake, including apolipoprotein B (<i>APOB</i>) and proprotein convertase subtilisin/kexin type 9 (<i>PCSK9</i>). Other genes account for a minority of cases. Diagnosis is based on LDL-C levels, a family history of elevated LDL-C or premature ASCVD, supportive physical findings such as tendinous xanthomas, and, when available, molecular confirmation of a pathogenic FH-causing variant. Prompt recognition and treatment with statins, often combined with ezetimibe, modifies the natural course of the disease. Sex differences in FH diagnosis and treatment are widely reported, with women diagnosed later and treated less intensively than men. PCSK9 inhibitors are often required in patients with FH who meet criteria for treatment intensification. In statin-intolerant patients, bempedoic acid may provide additional therapeutic options. The most severe form, homozygous FH (HoFH), has an estimated prevalence of ~1 in 367,000 individuals and is associated with ASCVD in youth, calcific aortic stenosis, and a markedly reduced life expectancy. Patients with HoFH require specialized care and may need LDL apheresis and specific orphan drugs such as lomitapide or evinacumab.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 4","pages":"4-14"},"PeriodicalIF":0.0,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13588205/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149008996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genetic Determinants of Inherited Cardiac Arrhythmias.","authors":"Ramon Brugada","doi":"10.14797/mdcvj.1827","DOIUrl":"10.14797/mdcvj.1827","url":null,"abstract":"<p><p>Inherited cardiac arrhythmias are a major cause of sudden cardiac death in individuals without structural heart disease. These conditions are primarily genetic, resulting from pathogenic variants affecting cardiac ion channels, calcium-handling proteins, intercellular junctions, and transcriptional regulators. While research has traditionally focused on ventricular syndromes such as long QT syndrome, Brugada syndrome, and catecholaminergic polymorphic ventricular tachycardia, atrial fibrillation-particularly early-onset disease-has been increasingly recognized as heritable, especially when affecting young individuals. Advances in molecular genetics have improved diagnosis, risk stratification, and family screening in these diseases as well as the possibility of postmortem evaluation of sudden unexplained death. This review summarizes the genetic basis and clinical implications of these inherited cardiac arrhythmias.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 4","pages":"78-86"},"PeriodicalIF":0.0,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13588221/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149009026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genetic Causes of Thoracic Aortic Aneurysm: A Review.","authors":"Rachel E Wittenberg, Mark E Lindsay","doi":"10.14797/mdcvj.1908","DOIUrl":"10.14797/mdcvj.1908","url":null,"abstract":"<p><p>Thoracic aortic aneurysm (TAA) is an important cause of cardiovascular morbidity and mortality. TAA may occur due to inheritable genetic variants affecting the TGFβ signaling cascade, the extracellular matrix, or smooth muscle contraction, which are essential to maintain connective tissue homeostasis and vascular wall integrity. In this review, we summarize the available evidence on the genetics of thoracic aortic aneurysm including known syndromic and non-syndromic hereditary thoracic aortic disorders, the increasingly recognized role of polygenic risk, and the association of TAA with other arteriopathies. We also discuss the evolving role of genetic testing for patients with TAA. A better understanding of genetic predictors for TAA has the potential to improve screening, risk stratification, and the medical and surgical management for this patient population.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 4","pages":"87-101"},"PeriodicalIF":0.0,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13588223/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149009032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Red Flags Were Missing, the Indication Was Not: Genetic Testing in Heart Failure and Cardiomyopathy.","authors":"Abou Bakr Salama","doi":"10.14797/mdcvj.1955","DOIUrl":"10.14797/mdcvj.1955","url":null,"abstract":"<p><p>Genetic testing is the step most often omitted once a cardiomyopathy has been characterized and the step most often misapplied when it is extended to people who have no phenotype. I describe a 68-year-old African American man with transthyretin amyloid cardiomyopathy who had none of the classic red flags, and use his case to define who should be tested, what must be excluded first, and what the result changes.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 4","pages":"102-105"},"PeriodicalIF":0.0,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13588222/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149009138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genetic and Conventional Risk Stratification Are Complementary for Primary Prevention of CAD.","authors":"Robert Roberts, MacKenna Roberts","doi":"10.14797/mdcvj.1851","DOIUrl":"10.14797/mdcvj.1851","url":null,"abstract":"<p><p>Primary prevention of coronary artery disease (CAD) needs to be initiated early in young asymptomatic individuals (20s, 30s). Current pooled cohort equation (PCE) risk stratification for CAD is based on conventional risk factors often not present until the fifth or sixth decade. Genetics accounts for 50% of risk for CAD. The number of DNA risk variants present in an individual, referred to as a polygenic risk score (PRS), can be used to risk stratify young asymptomatic individuals since the PRS is derived from DNA risk variants that are randomized at conception and can be determined at birth or anytime thereafter. The PRS does not change in one's lifetime; it has been evaluated in over 1 million individuals, and the top 20% have a threefold increased risk for CAD. The genetic risk for CAD as detected by PRS is independent of and complementary to conventional risk stratification. Genetic risk has been shown to be reduced by lowering plasma LDL-C, adopting a healthy lifestyle, and increasing physical activity. The minimal threshold required for clinical manifestations-as determined by mg per years of exposure to plasma LDL-C-is suggested to be around 5,000 mg years. This is considered the minimum clinical threshold based on a 1% incidence of myocardial infarction in the United States (US) at age 40 years and an average plasma LDL-C of 125 mg/dL, with a product of 40 × 125 resulting in 5,000 mg years. Utilizing PRS to detect candidates at increased risk for CAD while in their 30s, followed by an annual injection of a long-acting agent such as inclisiran to reduce plasma LDL-C in the range of 60 mg/dL, has the potential to delay the onset of a first myocardial infarction until age 80 years.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 4","pages":"40-50"},"PeriodicalIF":0.0,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13588228/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149009010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
István Gecse, Maria Guadalupe Lopez Trevino, Marcell Székely, Tomasso Cambiaghi, Ziyab Sarfaraz, Yuncen Atticus He
{"title":"David-V Procedure Combined with Zone 2 Arch Replacement for Acute Stanford Type A Dissection.","authors":"István Gecse, Maria Guadalupe Lopez Trevino, Marcell Székely, Tomasso Cambiaghi, Ziyab Sarfaraz, Yuncen Atticus He","doi":"10.14797/mdcvj.1902","DOIUrl":"10.14797/mdcvj.1902","url":null,"abstract":"<p><p>Valve-sparing aortic root replacement is increasingly used in selected patients with acute aortic dissection and preserved valve anatomy. We present the case of a 52-year-old man with acute Stanford type A aortic dissection extending from the aortic root to the iliac bifurcation with arch involvement; this was complicated by severe aortic insufficiency and right lower extremity malperfusion. The patient underwent emergent valve-sparing root replacement using the David technique combined with zone 2 arch reconstruction under hypothermic circulatory arrest and selective antegrade cerebral perfusion. Intraoperative echocardiography confirmed excellent valve function with trace residual regurgitation. The postoperative course was notable for transient vasoplegia and re-exploration without bleeding, followed by uneventful recovery and discharge on postoperative day 11. This case highlights the feasibility of combining valve-sparing root replacement with zone 2 arch reconstruction in the acute setting of Stanford type A dissection with malperfusion, allowing restoration of true lumen flow while preserving native valve function.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 1","pages":"64-69"},"PeriodicalIF":0.0,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13544042/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148897903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Circumaortic Configuration of the Left Coronary Arteries.","authors":"Damandeep Singh, Niraj Nirmal Pandey, Vineeta Ojha, Satyavir Yadav","doi":"10.14797/mdcvj.1830","DOIUrl":"10.14797/mdcvj.1830","url":null,"abstract":"<p><p>Coronary artery anomalies can be divided into anomalies of origin, course, or terminations of any of the epicardial coronary arteries. Coexistence of anomalous origin of the left circumflex artery with retroaortic course and anomalous origin of left anterior descending artery arising from the right coronary sinus with interarterial course is an exceedingly rare anatomical configuration. In the presence of this anomaly, conventional catheter angiography is challenging due to technical reasons and may lead to an inadvertent misdiagnosis of significant stenosis or occlusion of the coronary artery. This case highlights the importance of coronary computed tomography angiography in identifying a rare coronary artery anomaly and providing guidance for future endovascular or surgical procedures.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 1","pages":"53-56"},"PeriodicalIF":0.0,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13426445/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148654671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Merlyn Varghese, Anish Tayal, Madeline Drake, Ponraj Chinnadurai, Dora Z Zatyko, Alan B Lumsden
{"title":"Circumaortic Renal Vein Remodeling Following Abdominal Aortic Aneurysm Repair.","authors":"Merlyn Varghese, Anish Tayal, Madeline Drake, Ponraj Chinnadurai, Dora Z Zatyko, Alan B Lumsden","doi":"10.14797/mdcvj.1857","DOIUrl":"10.14797/mdcvj.1857","url":null,"abstract":"<p><p>A circumaortic renal vein is a congenital vascular anomaly involving an additional renal vein that traverses posterior to the aorta in addition to the normal renal vein traversing anterior to the aorta.<sup>12</sup> In aortic surgery, it is common to ligate the left renal vein (LRV) to aid in surgical exposure, which is typically inconsequential due to collateral venous channels. We report a case of a circumaortic LRV with the preaortic branch ligated during abdominal aortic aneurysm (AAA) surgery and, as a result, retroaortic LRV hypertrophy was observed during follow-up.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 1","pages":"57-60"},"PeriodicalIF":0.0,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13426446/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148654635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Miguel A Quiñones, Maan Malahfji, Tom Kai Ming Wang, Sarah Kazzaz, Mohamed M H Al-Kazaz
{"title":"State of the Art in Pericardial Disease: Webcast June 23 2026.","authors":"Miguel A Quiñones, Maan Malahfji, Tom Kai Ming Wang, Sarah Kazzaz, Mohamed M H Al-Kazaz","doi":"10.14797/mdcvj.1907","DOIUrl":"10.14797/mdcvj.1907","url":null,"abstract":"<p><p>This 58-minute webcast features a conversation on the \"State of the Art in Pericardial Disease\"-the focus of Issue 22.2 on the theme of pericardial disease. Led by the issue's editor, the discussion engages the authors on emerging themes and lessons learned while researching and writing the articles. View the video at https://vimeo.com/1204339129/42dd65d78b.</p>","PeriodicalId":39207,"journal":{"name":"Methodist DeBakey cardiovascular journal","volume":"22 1","pages":"61-63"},"PeriodicalIF":0.0,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13435323/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148674343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}