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Researchers at Johns Hopkins Hospital found that 24 models of
pacemakers and implanted defibrillators (see table) seemed to be
safe for use in a standard MRI machine. Keep in mind that the
Hopkins protocol included temporarily reprogramming implanted
devices for the duration of the MRI, turning off defibrillators'
shock function, reducing the energy of the MRI, continuous
monitoring with an electrocardiogram during the scan, and making
sure that equipment for restarting the heart and performing CPR
were immediately available. This study does not give a green
light for MRIs in everyone with a pacemaker or implanted
Pacemakers and defibrillators that satisfactorily underwent
MRI testing at Johns Hopkins Hospital
Many instances of "sudden" cardiac arrest are not sudden at all.
In the majority of occurrences there is at least one warning sign
before the event: chest pain, shortness of breah, nausea, and
dizziness are the most common ones.
The FDA has given limited approval to a fully implantable
artificial heart. But for the time being at least, eligibility is
limited to only those who have advanced heart failure and are
unable to have a transplant.
Potassium-based salt substitutes can help health-conscious eaters
reduce their sodium intake, but these products may dangerously
disrupt the heart's rhythm in those with diabetes or kidney
A hand-exercising device can lower blood pressure by boosting circulation, though it must be used consistently for at least a month before results can be seen.
A group of researchers measured the antioxidant content of
hundreds of foods. The top choices are healthy foods, which
reinforces the correlation between eating foods rich in
antioxidants and betrer overall health.
Reference books and online databases make it easier to know if a
generic version of a specific medication is available.
A study found that statins were less effective at lowering
cholesterol levels in blacks than in whites. The difference was
not attributable to one single reason, but it may mean that
blacks need to take another drug in conjunction with a statin.
Heart patients are being encouraged to get a flu shot, because
fiu can worsen heart disease or lead to pneumonia, which strains
the heart along with the rest of the body.
People with certain kinds of pacemakers or ICDs can safely
undergo an MRI, as long as a series of safety precautions is