November 22nd, 2011 by DrWes in News, Opinion
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From Medgadget via The Medical Quack:
EBR Systems, a start-up out of Sunnyvale California, and Cambridge Consultants, the technology design and development firm, have developed a leadless pacemaker system for patients with advanced heart failure. The Wireless Cardiac Stimulation System (WiCS) comprises two units, an implantable electrode and an external control unit. The electrode incorporates an ultrasonic, wireless receiver and delivers an electrical stimulus to the heart based on triggering signals from the external control unit.
In its current iteration the WiCS system is designed to work with conventional pacemakers/defibrillators pacing the right ventricle of patients requiring biventricular pacing. The WiCS external control unit senses the pacing stimulus delivered to the right ventricle and initiates a burst of stimulus from the electrode implanted in the left ventricle. According to the company, Read more »
*This blog post was originally published at Dr. Wes*
November 14th, 2011 by RyanDuBosar in News
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A 47-year-old Chicago man died after trying to remove his own pacemaker. He’s not the first to try self-surgery, as it turns out.
The Chicago Tribune described this most recent attempt at self-surgery:
“Chicago Fire Department paramedics were called after the man told a worker in the home that he was experiencing chest pains and asked them to call an ambulance.
“The man returned to his room, where he remained until paramedics arrived, police said. When they did, he complained to them about chest pains and was taken to the ambulance where he fell unconscious, police said.
“As paramedics were trying to revive him, they discovered Read more »
*This blog post was originally published at ACP Internist*
August 25th, 2011 by DrWes in Opinion, Research
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A new report published online in the Journal of the American College of Cardiology and reported in theHeart.org and elsewhere, suggests the infection rate of cardiac implantable electronic devices (CEID’s) between 1993 and 2008 has greatly increased from 1.53% in 2004 to 2.41% in 2008 (p < 0.001) with a dramatic rise in 2005:
Click image to enlarge
The authors explain this sudden increase on the basis of comorbities: Read more »
*This blog post was originally published at Dr. Wes*
August 18th, 2011 by DrWes in Opinion
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With the explosion of medical devices to treat various medical ailments in medicine, we have seen significant improvements in quality and quantity of life. An underappreciated consequence of all of these electronic device therapies, however, has been the manpower and expertise required to manage these implanted electronic medical devices long-term.
Problems with electromagnetic interference (EMI) with medical devices are real. Innovations in medicine have come from various portions of the electromagnetic spectrum including analog and digital wireless technology, diagnostic and therapeutic radiation therapy and magnetic resonance imaging. The effects of these technologies on implanted electronic medical devices can vary and specialty physicians, ancillary health care providers, and medical device manufacturers expend significant man-hours managing these potential interference sources and their affects on devices without a single prospective randomized trial to guide us. The sheer number of devices and the many ways that EMI can interfere with these complex devices makes constructing an all-inclusive trial with sufficient number of “events” to compare difficult or nearly impossible. As a result, most of our management recommendations and hospital policies in this regard have been based from literature case reports or personal experience and expertise.
To date, recommendations for minimizing EMI with cardiac implantable electronic devices has Read more »
*This blog post was originally published at Dr. Wes*
June 20th, 2011 by DrWes in True Stories
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Easy case.
Seen it a hundred times.
Old guy (or gal).
Comes into ER.
Found “down.”
“Hey doc, looks like his hearts goin’ slow. I think he (or she) needs a pacer.”
“On any meds that might do this?”
“Nah.”
“How’s his (her) potassium?”
“4.3, normal.”
And like lots of times, you head in. Glad you can help. Call-team’s on their way, thanks to you. Called the device rep to make sure they can be there just in case, too. Cool as a cucumber. Nothin’ to it. Been here, done this.
You arrive to a guy (or gal) that looks pretty good. Maybe has one or two medical problems. Heart rate’s better thanks to the atropine and the fluids they gave him (her) on arrival. The intraosseus line in the tibia is impressive, too. (“At least he (she) wasn’t awake when that happened,” you think.)
So you review, examine, plan your approach. EKG on presentation? Ouch, heart rate agonal. Wide complex rhythm of right bundle branch rhythm. Look at the monitor: “lots more right bundle branch rhythm there, thank goodness, P waves, too.” you secretely notice.
Seems he (or she) is willing (how many times does he (or she) want to pass out at home?), understands what lies ahead, that the crew’s on their way. “We’ll be taking you over in just a few minutes. Any other questions?” There are none.
Perfect.
And after a while the crew arrives, assembles the poor guy (or gal) on the table and ships him (or her) over to the cath lab area. Chest is prepped, equipment assembled, antibiotics given, monitors connected…
… damn we’re good. Smooth operators.
So the local anesthetic is injected and the incisions made. Dissection to the pre-pectoralis fascia just above the breast muscle accomplished, even the wires passed easily into the vein using ultrasound guidance. Even having a nice chat with the guy (or gal).
Poetry in motion.
Sheaths placed in the vein over the guidewire, pacing leads placed through the sheath. Until, from the control room… Read more »
*This blog post was originally published at Dr. Wes*
