Cardiovascular Disease Archives - PulmCCM
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Cardiovascular Disease Articles

Oct 162014
 
ICU Physiology in 1,000 Words: Stroke Volume Variation and the Concept of Dose-Response

Stroke Volume Variation and the Concept of Dose-Response Jon-Emile S. Kenny M.D. Awareness of the undulating pattern of an arterial line tracing is high amongst health professionals in the intensive care unit; certainly this is an aftereffect of a cacophony of studies and reviews pertaining to pulse pressure variation and fluid responsiveness in the operating [... read more]

Sep 052014
 
New 2014 Pulmonary Hypertension guidelines released

The American College of Chest Physicians (unaffiliated with PulmCCM) published its new consensus guidelines in August 2014 for the drug treatment of pulmonary arterial hypertension (PAH). They’re free to view on the Chest website, and well worth a look. Remember that pulmonary arterial hypertension (PAH) is but one small subset (“Group 1″) of the much larger [... read more]

Jun 262014
 
CPAP better than oxygen for obstructive sleep apnea

About half of people diagnosed with obstructive sleep apnea (OSA) can’t or won’t use the most effective therapy, overnight continuous positive airway pressure (CPAP). Most people with untreated OSA experience multiple episodes of hypoxemia — sometimes hundreds per night. For many patients declining CPAP treatment, their doctors provide overnight oxygen, in the hope that it might [... read more]

Apr 042014
 
Catheter directed thrombolysis for submassive PE: better than heparin? (RCT)

Image: EKOS Patients with acute pulmonary embolism (PE) fall into three general clinical categories: Massive PE, most often defined as hypotension due to right ventricular dysfunction. Short-term mortality is high (more than 1 in 7 die in-hospital). Systemic thrombolytic therapy (tissue plasminogen activator or tPA) is considered standard care by AHA and ACCP, because it [... read more]

Mar 162014
 
Beta blockers safe for most patients with asthma or COPD?

Beta-Blockers: Safe (and Effective?) for Most Patients with Asthma, COPD Once upon a time in 1964, it was noted that propranolol, a nonselective beta-blocker, could precipitate severe bronchospasm in patients with asthma, especially at high doses. Additional small studies showed propranolol and other nonselective beta blockers could increase airway resistance. British guidelines advise avoiding beta [... read more]

Jan 182014
 
Implantable tongue-buzzer improves obstructive sleep apnea by 70%

Source: Inspire Med Systems Update: Inspire’s hypoglossal nerve stimulator was approved by the FDA in April 2014. Hypoglossal Nerve Stimulation Markedly Improves OSA An estimated 15% of men and 6% of women in the U.S. have clinically significant obstructive sleep apnea, meaning it worsens their daytime cognitive functioning, cardiovascular risk, or both. In obstructive sleep [... read more]

Nov 282013
 
CPAP for sleep apnea improved drug-resistant hypertension

Most people with obstructive sleep apnea (OSA) have high blood pressure (hypertension), but treating OSA with continuous positive airway pressure (CPAP) has been shown to reduce blood pressure only minimally (by about 2.5 mm Hg). A randomized trial in the November 2013 Chest suggests that in people with severe drug-resistant hypertension with OSA, CPAP can [... read more]

Nov 232013
 
Hypothermia did not help after out-of-hospital cardiac arrest, in largest study yet

No Improvement in Cardiac Arrest Outcomes With Hypothermia Therapeutic hypothermia, or targeted temperature management, has become a standard component of post-cardiac arrest care. The evidence supporting this practice came from two small-to-medium-sized randomized trials, both published in the New England Journal of Medicine in 2002: Among 273 patients with out-of-hospital cardiac arrest due to shockable [... read more]

Nov 162013
 
Shock Review: Mechanisms and Therapies

Shock Review (Part 1 of 2) (See also Shock Review Part 2: Goals of Therapy) Jean-Louis Vincent, editor in chief of Critical Care, has a new review article on circulatory shock in the New England Journal of Medicine, where he’s also the editor of their new critical care section. Daniel De Backer co-authors. (See also [... read more]

Nov 162013
 
Shock Review: Goals of Therapy

Shock Review (Part 2 of 2) (See also Shock Review Part 1: Mechanisms and Therapies) Shock results from serious illness compromising either vascular muscle tone (most commonly septic shock), the heart’s function, or the volume of plasma inside blood vessels. The true goal of treatment for shock is to correct the underlying cause, but except [... read more]

Oct 292013
 
Esmolol infusion reduced septic shock mortality by 40% in RCT

Do I.V. Beta-Blockers Save Lives in Septic Shock? Catecholamines can be toxic — just ask anyone experiencing the heartbreak of tako-tsubo syndrome. Blocking the heart-flogging effects of the hormones epinephrine (adrenaline) and norepinephrine have long been known to improve long-term survival in congestive heart failure. People with septic shock might be the last group you’d consider giving [... read more]

Oct 162013
 
Spiriva Respimat inhaler as safe as HandiHaler (TIOSPIR)

Tiotropium: Safe In Either Form Tiotropium (Spiriva) comes in two devices: the Respimat in Europe delivers a mist, while the Handihaler in the U.S. delivers a dry powder. The Respimat has been bronchodilating under a dark cloud in Europe for the past 2 years, since a BMJ meta-analysis suggested there was a 52% increased risk of [... read more]

Sep 132013
 
Mild weight gain after quitting smoking outweighed by cessation's benefits

Weight Gain After Quitting Smoking Usually Mild, Harmless Nicotine is an anorexigen, or appetite suppressant. This “benefit” of cigarette smoking is no secret, certainly not to teenage girls, who in surveys report smoking to stay thin. Even among women smokers over age 40, more than half said they would not quit smoking if it meant they would [... read more]

Aug 162013
 
Vasopressin, steroids, epinephrine cocktail improved cardiac arrest outcomes

Adding Vasopressin, Steroids to Epinephrine Improved Cardiac Arrest Outcomes Contrary to what watching TV or even reading the newspaper will lead one to believe, outcomes after in-hospital cardiac arrest are very poor. Only about 1 in 5 survive to leave the hospital after cardiac arrest, and most survivors suffer significant cognitive impairment; up to half suffer [... read more]

Jul 272013
 
Diagnosing and managing obstructive sleep apnea, before and after surgery (Review)

Obstructive Sleep Apnea and Perioperative Complications: A Review Obstructive sleep apnea and other sleep disorders may affect as many as 70 million U.S. adults — 1 in 4 men and 1 in 10 women. People with obstructive sleep apnea are usually obese, have other medical conditions, and are more likely to undergo surgery than people [... read more]

Jun 072013
 
Managing anticoagulation for surgery and invasive procedures (Review)

Managing Anticoagulation Therapy For Surgery and Procedures (NEJM) See also: How to manage anticoagulation perioperatively (ACCP Guidelines) NOTE: This is a summary of an article in a medical journal, provided as a service to physicians. It is not medical advice. No one should ever make changes to their anticoagulation treatment except under a physician’s supervision. [... read more]

May 202013
 
Staph vaccine fails in cardiothoracic surgery patients

Staph Vaccine Fails in Cardiothoracic Surgery Patients Staphyloccocus aureus wound infections and bacteremia commonly complicate cardiothoracic surgery, even with meticulous attention to infection prevention. Staph mediastinitis, a deep infection of the surgical wound, is particularly feared and lethal. Vance Fowler et al randomized 8,031 people undergoing sternotomy to receive the V710 vaccine against S. aureus, [... read more]

Apr 122013
 
Inferior vena cava filters: debatable benefit; rarely removed

image: Wikimedia Inferior Vena Cava Filters: What’s the Harm? Do inferior vena cava filters actually create more harm than health? That’s the provocative question being posed by authors and editorialists in JAMA Internal Medicine. Inferior vena cava filters are frequently placed after a pulmonary embolism (PE) or deep venous thrombosis (DVT) in patients with a [... read more]

Mar 172013
 
FDA warns of sudden cardiac death with use of azithromycin

FDA Warns of Sudden Cardiac Death Risk from Azithromycin Last summer, PulmCCM reported on a New England Journal paper suggesting an increased risk of sudden cardiac death in patients taking even a short 5-day course of azithromycin. Yesterday, the FDA expressed its official concern in a Drug Safety Communication and statement to the press on [... read more]

Mar 062013
 
Diuretics beat ultrafiltration at treating congestive heart failure with acute renal failure (RCT)

Ultrafiltration No Better Than Diuresis for CHF Exacerbations by Blair Westerly, MD Cardiorenal syndrome — simultaneous heart failure and renal failure — is a frequently encountered problem in people with acute decompensated heart failure.  Treatment with diuretics for congestive heart failure exacerbations is standard care, but diuretics may at times worsen renal function. Venovenous ultrafiltration [... read more]