Publications by authors named "Charles B Porter"

Objective: To study the demographics, clinical presentations, and outcomes of emergency department (ED) visits of patients with heart transplantation (HT) in the United States.

Methods: We performed a secondary analysis of the National Emergency Department Sample database from 2016 to 2018. All ED visits of patients with HT aged ≥ 18 years were identified using International Classification of Diseases, Tenth Revision codes.

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Article Synopsis
  • The study investigates the prognostic significance of cardiopulmonary exercise testing (CPET) in patients with wild-type transthyretin cardiac amyloidosis (wtATTR) treated with tafamidis.
  • A total of 33 patients (average age 82) were analyzed, with findings indicating that lower levels of peak oxygen consumption and peak circulatory power, along with a shorter exercise duration, were linked to poor outcomes, including mortality and the need for heart transplant.
  • The results suggest that CPET measurements could help identify patients at higher risk for adverse events during tafamidis treatment, emphasizing the importance of exercise capacity in managing this condition.
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Cardiovascular disease and cancer are the leading causes of death in the United States, and hormone-dependent cancers (breast and prostate cancer) are the most common noncutaneous malignancies in women and men, respectively. The hormonal (endocrine-related) therapies that serve as a backbone for treatment of both cancers improve survival but also increase cardiovascular morbidity and mortality among survivors. This consensus statement describes the risks associated with specific hormonal therapies used to treat breast and prostate cancer and provides an evidence-based approach to prevent and detect adverse cardiovascular outcomes.

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Objectives: We sought to determine the utility of combined heart failure (HF) device diagnostic information to predict clinical deterioration of HF in patients with systolic left ventricular dysfunction.

Background: Some implantable devices continuously monitor HF device diagnostic information, but data are limited on the ability of combined HF device diagnostics to predict HF events.

Methods: The PARTNERS HF (Program to Access and Review Trending Information and Evaluate Correlation to Symptoms in Patients With Heart Failure) was a prospective, multicenter observational study in patients receiving cardiac resynchronization therapy (CRT) implantable cardioverter-defibrillators.

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Background: Lamin A/C mutations are a well-established cause of dilated cardiomyopathy (DCM), although their frequency has not been examined in a large cohort of patients. We sought to examine the frequency of mutations in LMNA, the gene encoding lamin A/C, in patients with idiopathic (IDC) or familial dilated cardiomyopathy (FDC).

Methods: Clinical cardiovascular data, family histories, and blood samples were collected from 324 unrelated IDC probands, of whom 187 had FDC.

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Experiments were conducted in the anesthetized rabbit to investigate mechanisms for arrhythmias that occur after left atrial injection of the thromboxane A(2) (TxA(2)) mimetic U-46619. Arrhythmias were primarily of ventricular origin, dose dependent in frequency, and TxA(2) receptor mediated. The response was receptor specific since arrhythmias were absent after pretreatment with a specific TxA(2) receptor antagonist (SQ-29548) and did not occur in response to another prostaglandin, PGF(2alpha).

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Background: Omega-3 fatty acids (FAs) appear to reduce the risk of sudden death from myocardial infarction. This reduction is believed to occur via the incorporation of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) into the myocardium itself, altering the dynamics of sodium and calcium channel function. The extent of incorporation has not been determined in humans.

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