When this happens the artery narrows and blood flow to part of the heart muscle decreases or stops. We're not sure what causes a spasm. A spasm can occur in normal-appearing blood vessels as well as in vessels partly blocked by atherosclerosis.A severe spasm can cause a heart attack.hen this happens the artery narrows and blood flow to part of the heart muscle decreases or stops. We're not sure what causes a spasm. A spasm can occur in normal-appearing blood vessels as well as in vessels partly blocked by atherosclerosis.
If this happens â and you have not executed a durable power of attorney â then the court may decide who will act on your behalf. Known as guardianship and conservatorship proceedings, these court actions can consume time and money and leave the decision of who will handle your affairs in the hands of a judge.
A power of attorney may also be for a limited time, such as when a person is out of the country. A limited power of attorney of this type may give an expiration date, after which time its powers are no longer valid. With any type of power of attorney, the powers granted terminate upon revocation. There may, however, be language in the power of attorney or specific state law that holds persons or institutions harmless, or not liable, when they act in good faith on a power of attorney if they received no notice of its revocation.