What started with the first-of-a-kind medical procedure, has led
to an article published in the Journal of the American College of
Cardiology on the results of a study of the implantable cardiac
monitor device by a University of Oklahoma Medical Center physician.
The first long-term test of an implantable device that measures
blood pressures within the heart may show how physicians could gain
greater control over heart failure and head off symptoms that often
lead to hospitalization, according to a new study in the Feb. 19
issue of the Journal. In the study of 28 heart failure patients who
received implantable hemodynamic monitors, hospitalization rates
dropped by half, from an average of once a year to just once every
other year. Also, researchers showed for the first time that heart
failure patients appear to fall into two groups - those with
generally stable pressures within the heart, and others in which the
pressures are highly variable.
In 1998, the cardiac team at the OU Medical Center headed by
Philip Adamson, a lead investigator of the device called the
Chronicle, was the first hospital in the country to implant the
"The disease is extremely expensive," Adamson said. "Most
hospitalizations in patients above age 65 are for heart failure. We
would hope that by using this device we could make a major dent in
the need for people to have to come in to the hospital."
Adamson was lead author of the article.
Adamson and colleagues at Mid-America Heart Institute, Kansas
City, Kan., Karolinska Hospital in Stockholm, Sweden, the University
Clinic in Homburg/Saar, Germany implanted the experimental devices
developed by Medtronic Inc. of Minneapolis and analyzed the
hospitalization information of 28 patients for 26 months.
Similar to a pacemaker, the device is placed in the pectoral
area. A pressure sensor extends into the outflow tract of the
heart's right ventricle (which pumps blood to the lungs).
Adamson said he was surprised to see that the devices often began
sensing pressure changes well in advance of patients reporting
"Congestive heart failure patients typically develop too much
water in their system and that water increases the pressures inside
the heart," Adamson said. "I thought there might be some changes
around the time of an event, but when the event was major, requiring
hospitalization, we saw those changes four or five days before the
patient even came to the hospital or the doctor. With that
information, we were sometimes able to make changes in diuretics and
avoid precautionary hospitalizations."
This study is the first to report that some heart failure
patients have more variable pressures than other patients.
Adamson said a larger trial of the implantable heart pressure
sensor should begin in the near future.
Publication started for women dentists
PennWell has launched Woman Dentist Journal, a publication to
address the needs of women dentists.
Published six times a year initially, with the first issue in
January/February 2003, Woman Dentist Journal will cover topics
including clinical dentistry, scientific abstracts, practice
management, and lifestyle issues for a circulation of 26,000 women
dentists. Woman Dentist Journal will be published out of PennWell's
headquarters in Tulsa and will also serve as the official magazine
of the American Association of Women Dentists.
Woman Dentist Journal is the latest addition to PennWell's
information franchise serving the dental industry. PennWell
publishes Dental Economics, a practice management magazine for
100,000 dentists, RDH (Registered Dental Hygienist), Dental Student,
Dental Equipment and Supplies and Proofs, which serves dental
marketers and dealers. PennWell also conducts nearly 20 conferences
and seminars annually on cosmetic dentistry, practice management,
and retirement planning for dentists. …