Brief Answer:
May be nothing, may be pre-hypertension; further tests

Detailed Answer:
Greetings, sir! My name is Dr. Meriton. Welcome to HealthCare Magic and thank you for your question. I carefully read your query.

From the above listed food and beverages you had, it is only coffee and other caffeine-containing beverages that can increase the blood pressure. Ensure drink and banana can have other affects in the body, such as in nutrients and electrolytes, and uncommon, but not impossible, affect on the blood pressure. I would like you to understand that blood pressure can fluctuate within a day, within its normal ranges, and also out of normal ranges. But, these fluctuations or increases that happen once a day and are related to a certain physiological, psychological, hormonal or consumed substance phenomenon, are not worrisome. Normal range of blood pressure is as follows: systolic 100-139 mmHg and diastolic 60-89 mmHg. On the other hand, a 61-year old gentleman is age-predisposed to essential high blood pressure (hypertension) and even this diagnosis would not come as a XXXXXXX if you add a probable first blood relative or close family member that had hypertension and had its onset approximately in their sixties. Therefore, I would recommend you not to rely on a one-time or one-period-a-day measurement, but to measure your blood pressure at least five times in one day, in different periods of day, after you have been fifteen minutes in resting state and two or three hours away from the consumption of the last caffeine-based beverage, such as coffee, tea or energy drinks. This could be done even more precisely, if you wore a 24-hour blood pressure monitor, which would depict the original blood pressure levels spun throughout one day. If the diagnosis of pre-hypertension or hypertension is established, proper treatment with a drug from one of a lot of blood pressure-lowering classes of drugs, should be installed, with the aim to keep the blood pressure figures under 140/90 mmHg. Constant and long-standing blood pressure figures above these figures, may produce irreversible arterial changes in end-organs, starting from the organs with high amount of small calibre arteries and, then, all arterial calibres. As for the symptoms you provided above, combining them with your age and probable risk factors for cardiovascular disease, I would also recommend a cardiac check-up. At this moment, an EKG and an echocardiogram would suffice, and judged by your attending cardiologist, you could also undergo a cardiac stress testing. To sum up, as I said above, this hopefully is just an episode and it is not repeated. But, if I were your doctor, according to your age of 61, I would not just "send you home" without at least excluding some of the main factors as culprits for this episode.

I hope I was helpful and thorough with my answer. If you have further questions, I would be happy to help. Wish you a good health.

Best regards,
Dr. Meriton

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