<p>The Food and Drug Administration has issued alerts for electrical problems tied to Boston Scientific's heart-zapping defibrillator systems and a separate issue with heart implant used to reduce stroke risk.</p><p>The agency says the issue that defibrillator wires could cause the implants to fail to deliver adequat electrical shocks.</p><p>Seperately, the FDA highlighted new, updated instructions for the company's Watchman heart implant. </p><p>Boston Scientific says the increased risk of dangerous blockages in the bloodstream is due to how the device is implanted.</p><p>I'm Lisa Dwyer.</p>
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