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.
A power of attorney refers to a written instrument, executed by one person (the principal) that allows another person (the attorney in fact) to act on their behalf. If the principal dies the power of attorney is extinguished. If the attorney in fact dies the principal must execute a new power of attorney that names a new attorney in fact.
If you don't, in most states, it will automatically end if you later become incapacitated. Or, you can specify that the power of attorney does not go into effect unless a doctor certifies that you have become incapacitated. This is called a springing durable power of attorney. You revoke it. 2  As long as you are mentally competent, you can revoke a durable power of attorney at any time. 3  You get a divorce. 4  In a handful of states, if your spouse is your agent and you divorce, your ex-spouse's authority is automatically terminated.