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.
On revocation of the power of attorney by principal (the person giving the power of attorney), or on the death of the principal. A power of attorney may provide its own expiration date. Otherwise, a power of attorney does not expire (except upon the death of the person who created the power of attorney).