Final answer:
Poorly controlled hypertension can lead to stroke, myocardial infarction, congestive heart failure, and renal failure. However, Alzheimer's dementia is not directly associated with poorly controlled hypertension.
Step-by-step explanation:
High blood pressure, also known as hypertension, can lead to several complications if left uncontrolled. These include stroke, myocardial infarction (heart attack), congestive heart failure, and renal failure. However, Alzheimer's dementia is not typically considered a direct risk of poorly controlled hypertension.