Middle-aged woman with risk factors and prolonged oppressive back pain at rest

HDA: female, 44-year-old patient: hypertensive, diabetic, and dyslipidemic; admitted on February 29th, 2012 due to complaint of dyspnea and posterior oppressive chest pain for 3 h, irradiating to the precordial area, without triggering factor. At the time, she was adynamic, with significant bradyarrhythmia, BP of 130×80 mmHg and lower limbs pain. She mentioned a catheterization 5 years ago, after the episode of pain similar to the current one, not knowing the result of the test. She denies having syncopes or lipothymia episodes.

Medications in use: Glibenclamide 5 mg 1 cp in jejunum and 1 cp before lunch; enalapril 5 mg 1 cp of 12/12 h; simvastatin 40 mg 1 cp after meals; calcium carbonate 500 mg 1 cp at the time of lunch; omeprazol 20 mg.
She denies syncopes or SCD in 1st, 2nd, or 3rd degree relatives.

Laboratory tests (Feb. 29, 2012): Hb: 11.9; Ht: 38.6%; glucemia: 267 mg/dL; Urea: 32 mg/dL; creatinine: 0.8 mg/dL Cl: 100.9 mEq/L; K+: 4.7 mEq/L; Na+: 137 mEq/L GOT: 27 U/L; GPT: 35 U/L; TSH: 2.67 uL U/mL; leukocytes: 6,030/mm 3 rods: 0; segmented: 53% platelets: 227,000/mm3 troponin and CK-MB are normal.

Echocardiogram (March 2, 2012):
heart chambers of normal dimensions and septum and free wall with normal thickness. EF = 56%
LV systolic function: reduced in a mild degree
Mild diastolic dysfunction of the LV
Valves with no significant alterations.
Catheterization (March 3, 2012): normal coronary arteries. Normal LV function.
Initial prescription: ASA, clopidogrel, isordil, losartan, atorvastatin, metformin, glibenclamide, regular insulin according to HGT, omeprazole.

Question

What would you do with this patient? Pharmacological test? EPS? There is 1 ECG showing sinus bradycardia with sinus arrest.

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