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    <recommendedItem id="20100101_19_441"
                     title="Be Ready for Drug-Induced Vfib, Groups Urge (CME/CE)"
                     score="0.014"
                     href="http://www.medpagetoday.com/Cardiology/Arrhythmias/tb/18358?impressionId=1265805221709"
                     
      Awareness of medication-induced torsade de pointes and a preset protocol for treating it could save lives in the hospital with swift action to prevent cardiac arrest, according to a joint statement from two professional associations.&lt;br&gt;
&lt;br&gt;These cases &quot;should be avoidable&quot; with consistent electrocardiographic monitoring of patients receiving drugs known to prolong the QT interval, the American Heart Association and American College of Cardiology wrote in a statement endorsed by the American Association of Critical-Care Nurses.&lt;br&gt;
&lt;br&gt;The rare arrhythmia often provides telltale signs on ECG an hour or so before ventricular fibrillation, according to writing committee chair Barbara J. Drew, RN, PhD, of the University of California San Francisco, and colleagues.&lt;/p&gt;
&lt;p&gt;However, the statement made no one-size-fits-all recommendation on what cardiac monitoring should entail, given hospital-to-hospital differences in equipment that range from fully automated QT-monitoring systems at the high end to a computer-assisted electronic caliper feature at the other.&lt;/p&gt;
&lt;p&gt;&quot;Of utmost importance, however, is that a hospital protocol be established so that a single consistent method is used by all healthcare professionals charged with the responsibility for cardiac monitoring,&quot; Drew&apos;s group wrote.&lt;/p&gt;
&lt;p&gt;This protocol should stipulate which equipment to use for QT measurement, how to determine the end of the T wave, the formula for heart rate correction, lead-selection criteria, and the importance of measuring the same lead in the same patient over time, they said.&lt;/p&gt;
&lt;p&gt;The new statement, published online in &lt;em&gt;Circulation: Journal of the American Heart Association&lt;/em&gt; and the &lt;em&gt;Journal of the American College of Cardiology&lt;/em&gt;, included the following signs of impending torsade de pointes: &lt;ul&gt; &lt;li&gt;An increase of 60 ms in heart-rate&amp;#8211;corrected QT interval (QTc) from the preadministration baseline&lt;/li&gt; &lt;li&gt;Marked QTc interval prolongation of more than 500 ms&lt;/li&gt; &lt;li&gt;The characteristic &quot;twisting&quot; of the points on ECG as T-U wave distortion becomes more exaggerated in the beat after a pause&lt;/li&gt; &lt;li&gt;Visible (macroscopic) T-wave alternans&lt;/li&gt; &lt;li&gt;New-onset ventricular ectopy&lt;/li&gt; &lt;li&gt;Couplets and &lt;span&gt;nonsustained&lt;/span&gt; polymorphic ventricular tachycardia initiated in the beat after a pause&lt;/li&gt; &lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Prompt recognition of these ECG harbingers allows for treatment with intravenous magnesium, removal of the drug that induced the condition, and correction of electrolyte abnormalities and other exacerbating factors, including the prevention of bradycardia and long pauses with temporary pacing if necessary, according to the new statement.&lt;/p&gt;
&lt;p&gt;Prior guidelines on ventricular arrhythmias provided little help with prevention of torsade de pointes in the hospital but did recommend discontinuation of whatever drug induced long QT syndrome.&lt;/p&gt;
&lt;p&gt;The most common drugs associated with this potentially fatal arrhythmia are antibiotics, antipsychotics, and antiarrhythmia drugs.&lt;/p&gt;
&lt;p&gt;Administration in the hospital is more likely to be associated with torsade de pointes than is treatment of an outpatient population with the same drug, Drew&apos;s group noted.&lt;/p&gt;
&lt;p&gt;Hospitalized patients are often elderly, with comorbidities such as underlying heart disease and renal or hepatic dysfunction. They are also more likely to get intravenous push of the drugs.&lt;/p&gt;
&lt;p&gt;Clinical risk factors for torsade de pointes include: &lt;ul&gt; &lt;li&gt;A preexisting long QTc interval of more than 500 ms&lt;/li&gt; &lt;li&gt;Concurrent use of more than one QT-prolonging drug&lt;/li&gt; &lt;li&gt;Rapid infusion of a QT-prolonging drug intravenously&lt;/li&gt; &lt;li&gt;Heart disease, such as MI or heart failure&lt;/li&gt; &lt;li&gt;Advanced age&lt;/li&gt; &lt;li&gt;Female sex&lt;/li&gt; &lt;li&gt;Hypokalemia&lt;/li&gt; &lt;li&gt;Hypomagnesemia&lt;/li&gt; &lt;li&gt;Hypocalcemia&lt;/li&gt; &lt;li&gt;Treatment with diuretics&lt;/li&gt; &lt;li&gt;Impaired hepatic drug metabolism, whether from hepatic dysfunction or drug-drug interactions&lt;/li&gt; &lt;li&gt;Bradycardia&lt;/li&gt; &lt;/ul&gt;&lt;/p&gt;
&lt;div style=&quot;float:left;border-style:solid;border-width:1px;border-color:#8dabbc;font-family:arial;font-size:12px;background-color:#DBE9F2;padding:5px;&quot;&gt;&lt;p&gt;Drew reported conflicts of interest with GE Healthcare and Philips.&lt;/p&gt;&lt;p&gt;Co-authors reported conflicts of interest with Medtronic, Pfizer, PGxHealth, FAMILION, GE HealthCare, Philips Healthcare, Abbott, Bristol-Myers Squibb, sanofi-aventis, Schering Plough, Inovise, Siloam, ArgiNOx, Astellas, Daiichi Sankyo/Lilly, Heartscape Technologies, Biosite, Inovise, Medicines Co., Millennium Pharmaceuticals, PDL BioPharma, Roche Diagnostics, Scios, Mortara Instrument, Cardiac Science, MDS Pharma, Medicure, St. Jude, Adolor, ARCA, AstraZeneca, Avanir, Cardiome, CardioDx, Novartis, Ortho Diagnostics, Sanofi, Vanderbilt/Clinical Data, iCardiac Technologies, LipoScience, Anthera, Abbott Vascular, Novo Nordisk, Roche, Biotronic, and Boston Scientific.&lt;/p&gt;&lt;/div&gt;&lt;div style=&quot;clear:both;&quot;&gt;&lt;/div&gt;
    </recommendedItem>
    <recommendedItem id="20100101_19_231"
                     title="FDA Adds Cardio Warnings to Weight-Loss Drug"
                     score="-0.001"
                     href="http://www.medpagetoday.com/ProductAlert/DevicesandVaccines/tb/18088?impressionId=1265805221709"
                     
      &lt;p&gt;WASHINGTON  --  The FDA said the weight-loss drug sibutramine (Meridia) should not be taken by patients with history of cardiovascular disease following a review of additional data showing an increased risk of heart attack and stroke among that population.&lt;/p&gt;
&lt;p&gt;The agency said the manufacturer, Abbott, has agreed to add the contraindication to its labeling, which will be expanded to include patients with a history of the following: &lt;ul&gt; &lt;li&gt;Coronary artery disease (i.e., heart attack, angina)&lt;/li&gt; &lt;li&gt;Stroke or transient ischemic attack&lt;/li&gt; &lt;li&gt;Heart arrhythmia&lt;/li&gt; &lt;li&gt;Congestive heart failure&lt;/li&gt; &lt;li&gt;Peripheral arterial disease&lt;/li&gt; &lt;li&gt;Uncontrolled hypertension (&amp;gt;145/90 mmHg)&lt;/li&gt; &lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;The initial review of sibutramine began in November 2009 when the FDA received preliminary data from the SCOUT study suggesting patients using the drug had a higher risk for cardiovascular events. (See &lt;a href=&quot;http://www.medpagetoday.com/ProductAlert/Prescriptions/17147&quot; mce_href=&quot;http://www.medpagetoday.com/ProductAlert/Prescriptions/17147&quot; target=&quot;_blank&quot;&gt;Early Data Link Diet Drug to MI, Stroke, and Cardiac Death&lt;/a&gt;)&lt;/p&gt;
&lt;p&gt;Prior to review, the product label included a warning for patients with cardiovascular disease.&lt;/p&gt;
&lt;p&gt;Healthcare professionals should monitor patients for increase in blood pressure and heart rate and should discontinue therapy if either increase is observed, an FDA statement said.&lt;/p&gt;
&lt;p&gt;Patients should also discontinue use of sibutramine if they do not lose 5% of their baseline body weight within the first three to six months of treatment, as the drug may not be effective and puts the patient at unnecessary risk, the release said.&lt;/p&gt;
&lt;p&gt;The FDA said its review of SCOUT study data, as well as other information related to the drug&apos;s risks and benefits, is ongoing and will be followed by an open public advisory committee meeting to determine if it requires additional regulatory action.&lt;/p&gt;

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                     title="Children Survive In-Hospital Cardiac Arrests Better Than Adults"
                     score="-0.005"
                     href="