What is the difference between a myocardial infarction and angina pectoris?

What is the difference between a myocardial infarction and angina pectoris? Use the following terms (or derivatives) in your answer:infarctischemiathrombus andocclusion.
Joe Sixpack recently visited the dentist to have his teeth cleaned and checked. During the cleaning process Joe had some bleeding from his gums. A couple of days later Joe developed a fever rapid heartbeat sweating and chills. He visited his family physician who detected a slight heart murmur. Joe was given antibiotics and continued to have his heart monitored.
Question for you to answer:
How was Joes dental visit related to his illness?
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