Final answer:
The nurse should report immediately if the client taking aspirin has increased blood pressure, as chronic use of aspirin may lead to serious cardiovascular concerns.
Step-by-step explanation:
If a nurse in a provider's office is assessing a client who has been taking aspirin daily for the past year, the finding that should be reported immediately to the provider is increased blood pressure. Aspirin is a non-steroidal anti-inflammatory drug (NSAID) with anticoagulant properties, intended to reduce the formation of blood clots. While it can offer protective benefits for the heart, chronic use can result in significant side effects such as gastrointestinal ulcers and bleeds, heart attack risk, and kidney disease. Therefore, an acute increase in blood pressure might indicate a serious cardiovascular concern that needs prompt attention from the healthcare provider. Other findings like decreased heart rate or weight gain can also be related to aspirin use but do not typically require immediate attention, while improved sleep patterns are generally not associated with the use of aspirin.