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By Michael H. Crawford, MD
Synopsis: BiV capture can be accurately detected by observing the R/S ratio in leads V1 and I of the 12-lead ECG.
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By Michael H. Crawford, MD
Synopsis: Acute acetylcholinesterase inhibition reduced standing heart rate and symptoms in POTS patients.
Source: Raj SR, et al. Acetylcholinesterase Inhibition Improves Tachycardia in Postural Tachycardia Syndrome. Circulation. 2005;111:2734-2740.
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By Jonathan Abrams, MD
Professor of Medicine, Division of Cardiology, University of New Mexico, Albuquerque Dr. Abrams serves on the speakers bureau for Merck, Pfizer, and Parke-Davis.
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By Jonathan Abrams, MD
Synopsis: A majority of patients report improvement in functional quality of life early after AVR. Similar functional recovery was demonstrated for patients along the full spectrum of valve sizes indexed to body size, even for values considered to represent severe mismatch for patient size. Factors other than prosthesis-patient size influence functional quality of life early after AVR.
Source: Koch CG, et al. Impact of Prosthesis-Patient Size on Functional Recovery After Aortic Valve Replacement. Circulation. 2005:111:3221-3229.
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By Michael H. Crawford, MD
Synopsis: BNP levels are significantly elevated in RCM patients as compared to CP patients, and should be a useful noninvasive marker to distinguish the 2 conditions.
Source: Leya FS, et al. The Efficacy of Brain Natriuretic Peptide Levels in Differentiating Constrictive Pericarditis From Restrictive Cardiomyopathy. J Am Coll Cardiol. 2005;45:1900-1902.
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A new study from England defines acute lower respiratory tract infection as an uncomplicated acute illness, with cough as the primary symptom and at least one symptom or sign localized to the lower respiratory tract including sputum, chest pain, dyspnea, or wheeze.
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Roche is Under Pressure Over Its Antiviral Drug Tamiflu; ACE Inhibitors or ARBs for Prediabetics?; Xigris is Approved for Severe Sepsis; ACE Inhibitors Inhibiting Aortic Valve Stenosis?; FDA Actions
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By Michael H. Crawford, MD
Synopsis: Damage to the tricuspid valve caused by electrophysiologic device leads may be a cause of predominant right heart failure due to severe TR and may not be recognized on routine echocardiography.
Source: Lin G, et al. Severe Symptomatic Tricuspid Valve Regurgitation Due to Permanent Pacemaker or Implantable Cardioverter-Defibrillator Leads. J Am Coll Cardiol. 2005;
45:1672-1675.
