A 44-Year-Old Man with Intermittent Dizziness

Case
A 44-year-old man presents to your urgent care center complaining of intermittent dizziness. He denies shortness of breath, fever, chest pain, and syncope.
Upon exam, you find:

General: Alert and oriented
Lungs: CTAB
Cardiovascular: RRR without murmur, rub, or gallop
Abdomen: Soft and NT without r/r/g

View the ECG and consider what the diagnosis and next steps would be. Resolution of the case is described on the next page.