Bienvenido al ::: SerTox :::!

     Menú
· Noticias
· Institucional
· Investigación
· Materiales Educativos
· Biblioteca multimedia
· Preguntas frecuentes
· Boletín
· Buscar
· Contáctenos
· Enlaces - Directorio
· Glosario
· Noticias x Mes
· Temas
· Top 15

EnglishSpanish

     Buscar


     Categorías
· Todas las Categorías
· Aportes
· Ejercicios
· Informan / Escriben
· La prensa
· Noticias del Sertox
· Recomendamos
· Toxicología al día
· Trivia toxicológica
· zNo sólo de tóxicos

     Blogs



     Manifiesto amianto





 Toxicología al día: New Zealand findings are the first study to indicate a potential link between marijuana and stroke

Ver Imagen

Hoja de marihuana (Foto: Sertox )

Smoking marijuana associated with higher stroke risk in young adults. newsroom.heart.org. February 06, 2013.
  • Marijuana use may double the risk of stroke in young adults.
  • The New Zealand findings are the first from a case-controlled study to indicate a potential link between marijuana and stroke.
Marijuana, the most widely used illicit drug, may double stroke risk in young adults, according to research presented at the American Stroke Association’s International Stroke Conference 2013.


In a New Zealand study, ischemic stroke and transient ischemic attack (TIA) patients were 2.3 times more likely to have cannabis, also known as marijuana, detected in urine tests as other age and sex matched patients, researchers said.

“This is the first case-controlled study to show a possible link to the increased risk of stroke from cannabis,” said P. Alan Barber, Ph.D., M.D., study lead investigator and professor of clinical neurology at the University of Auckland in New Zealand. “Cannabis has been thought by the public to be a relatively safe, although illegal substance. This study shows this might not be the case; it may lead to stroke.”

The study included 160 ischemic stroke/TIA patients 18-55 years old who had urine screens upon admission to the hospital. Among the patients, 150 had ischemic stroke and 10 had TIAs. Sixteen percent of patients had positive drug screens, mostly male who also smoked tobacco.

Only 8.1 percent of controls tested positive for cannabis in urine samples. Researchers found no differences in age, stroke mechanism or most vascular risk factors between marijuana users and non-users.

In previous case reports, ischemic stroke and TIAs developed hours after cannabis use, Barber said. “These patients usually had no other vascular risk factors apart from tobacco, alcohol and other drug usage.”

It’s challenging to perform prospective studies involving illegal substances such as cannabis because “questioning stroke and control patients about cannabis use is likely to obtain unreliable responses,” Barber said.

In the study, the regional ethics committee allowed researchers to use urine samples from other hospitalized patients. But researchers knew only the age, sex and ethnicity for matching due to a lack of consent.

The study provides the strongest evidence to date of an association between cannabis and stroke, Barber said. But the association is confounded because all but one of the stroke patients who were cannabis users also used tobacco regularly.

“We believe it is the cannabis and not tobacco,” said Barber, who hopes to conduct another study to determine whether there’s an association between cannabis and stroke independent of tobacco use. “This may prove difficult given the risks of bias and ethical strictures of studying the use of an illegal substance,” he said. “However, the high prevalence of cannabis use in this cohort of younger stroke patients makes this research imperative.”

Physicians should test young people who come in with stroke for cannabis use, Barber said.

“People need to think twice about using cannabis,” because it can affect brain development and result in emphysema, heart attack and now stroke, he said.

Co-authors are: Heidi Pridmore, M.D.; Venkatesh Krishnamurthy, M.D.; Sally Roberts, M.D.; David A. Spriggs, M.D.; Kristie Carter, Ph.D.; and Neil E. Anderson, M.D. Author disclosures and funding information are on the abstract.

Follow news from the ASA International Stroke Conference 2013 via Twitter @HeartNews; #ISC13.

Statements and conclusions of study authors that are presented at American Stroke Association scientific meetings are solely those of the study authors and do not necessarily reflect association policy or position.  The association makes no representation or warranty as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events.  The association has strict policies to prevent these relationships from influencing the science content.  Revenues from pharmaceutical and device corporations are available at www.heart.org/corporatefunding.

Enviado por jcp el 07 febrero 2013 00:00:00 (534 Lecturas)






Artículos e imágenes de:
 Artículos y Textos Científicos
Artículos y Textos Científicos
 África y Oceanía
África y Oceanía
 Drogas: Marihuana / Cannabis
Drogas: Marihuana / Cannabis

 
     Enlaces Relacionados


Noticia más leída sobre Artículos y Textos Científicos:
De Martín Cañás: Herbalife + hepatotoxicidad


     Votos del Artículo
Puntuación Promedio: 0
votos: 0

Por favor tómate un segundo y vota por este artículo:

Excelente
Muy Bueno
Bueno
Regular
Malo


     Publicidad






Todos los logos y marcas registradas son propiedad de sus respectivos dueños. Los comentarios son propiedad de quienes lo envían, todo el resto © 2006-2011 by Sertox.

Webs Asociadas: www.country2.com / Radio FM Estacion San Pedro / Lombó Teatro Salamanca - Zamora

PHP-Nuke Copyright © 2005 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Página Generada en: 0.04 Segundos