Brief Answer:
Stop Smoking , Get Tested.
Detailed Answer:
Dear Sir,
Cigarette contains nicotine, which can cause sympathetic stimulation causing transient increase in
heart rate and blood pressure.
However, smoking can lead to brain clots leading to Stroke and left sided weakness, but it is not transient.
However, you might had Transient
Ischemic Stroke (TIA).
Currently i advise you strongly not to smoke, moreover, you are in your 50's. and you already have many risk factors for stroke and heart attacks , like
High blood pressure,
Sleep apnea.
Why to add smoking as one more risk factor in your list
Get yourself tested, ECG,
Lipid profile, kidney functions, Urine for albumin.
And since you know you have sleep apnea, i want to tell you and if you know remind you, that sleep apnea is an established risk factor for coronary artery disease.
Stop Smoking At All.
See your body is warning you. Feel and take seriously that warning.
I hope i am able to solve your query, If still you have something in your mind, you can ask me.
Stay Healthy