December 30th, 2011 by John Mandrola, M.D. in Opinion, Research
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It is risky.
Stay fresh. Avoid repeating yourself. Don’t rant. Never preach. These would be the ‘rules’ of supposedly good blogs.
And, of course, doctors that dare to take a stance on health issues risk being perceived as pretentious. I get this.
So it is with trepidation that I write a follow-up to last week’s CW post about right ventricular damage immediately after an extreme race effort. Notwithstanding the pompousness concern, I also wish to avoid being labeled anti-exercise. Few believe more strongly in the healing powers of exercise.
But last Wednesday’s comments (both on the blog, Facebook and here on Dr. Val Jones’ BetterHealth blog) were just too good to let rest.
On the assessment of studies: Read more »
*This blog post was originally published at Dr John M*
December 28th, 2011 by Howard LeWine, M.D. in Health Tips, Research
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When you sit quietly, your heart slips into the slower, steady pace known as your resting heart rate. A new study suggests that an increase in this rate over time may be a signal of heart trouble ahead.
Your heart rate changes from minute to minute. It depends on whether you are standing up or lying down, moving around or sitting still, stressed or relaxed. Your resting heart rate, though, tends to be stable from day to day. The usual range for resting heart rate is anywhere between 60 and 90 beats per minute. Above 90 is considered high.
Many factors influence resting heart rate. Genes play a role. Aging tends to speed it up. Regular exercise tends to slow it down. (In his prime, champion cyclist Lance Armstrong had a resting heart rate of just 32 beats per minute.) Stress, medications, and medical conditions also influence the heart rate.
In today’s Journal of the American Medical Association, researchers from Norway report Read more »
*This blog post was originally published at Harvard Health Blog*
December 26th, 2011 by Medgadget in News
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Abiomed‘s Impella left ventricular assist device, an endovascular percutaneously-delivered LVAD, will soon be getting a more powerful new model. The current model is capable of delivering an augmentation of cardiac output by up to 2.5 liters a minute, but the new Impella cVAD should do around 3.5 L/m, and possibly up to 4 L/m in the not too distant future.
The new device, and above numbers, were announced at Abiomed’s investor day conference and the company hopes to have the device available to clinicians by the Summer of 2012.
Here are the bullet points about Impella cVAD that were provided to us by Abiomed: Read more »
*This blog post was originally published at Medgadget*
December 20th, 2011 by DrWes in Opinion
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“How are you feeling, Ms. Jones?”
“Fine.”
“Have you been more short of breath lately?”
“Not really, just when I exercise.”
“How much exercise?”
“I dunno. But after I go to the mailbox and walk back up to the house, I’ve got to stop now where before I didn’t.”
Exertional dyspnea. It conjures up a large differential of potential cardiovascular or pulmonary causes. And as the above commonly-encountered doctor-patient conversation demonstrates, the problem is a dynamic one: at rest things are often fine, on exertion or with recumbency less so.
Now imagine that the doctor then sees elevated neck veins, hears rales in the lower lung fields, and sees swollen ankles on their patient. Heart failure, right? Read more »
*This blog post was originally published at Dr. Wes*
December 18th, 2011 by John Mandrola, M.D. in Research
4 Comments »
Dear Endurance Athletes,
Accept an apology in advance. You have endured so much from me.
Sorry.
Let’s at least start by agreeing that I can’t control the data.
Yes, you guessed it. There is unfortunately more bad news pertaining to the deleterious effects of endurance exercise on the human heart.
Again, I am sorry. Maybe re-phrasing the previous sentence will soften the blow. How about this: “Yet another study on endurance athletes suggests that exercise, like everything else in life, has an upper limit.”
Here goes, buckle up. Read more »
*This blog post was originally published at Dr John M*
