After working in the garden i suddenly felt dizzy and could not talk, my tounge felt thick. i am on hipertention meds as well as heart rythem. ?

Dizzy : I wish I could be certain about this, but there is no way to be sure via this forum. With that being said you should go to the hospital it may have been a mini-stroke or serious heart condition

Concerning: Sounds like a TIA, or perhaps a lacunar stroke, and you do indeed possess risk factors. Contact your physician ASAP, as there indeed is distinct risk for further neurological events, and preventative meds are indicated.

TIA: I commend you for following through for your “Hypertension and Heart Rhythm” I understand your distress. Onset of new and severe symptoms of “suddenly felt dizzy and could not talk” requires immediate Evaluation. Please have a family member or call 911 to go to ER for Diagnosis and Treatment. Your Health is Precious!