Advanced Life Support in bradycardia

A 57 year old man was driven by an ambulance with following symptoms: dizziness, shortness of breath, weakness and faint. At arrival you administer oxygen, secure iv line and perform 12 lead ECG. Present bradycardia is an indication for:
57
years
man
RR
19 /min
HR
40 /min
BP
90/60 (70) mmHg
Glycaemia
Gly
11,0  mmol/L
Arterial blood gas
pH
7,32
pCO2
26,25  torr
pO2
66  torr
BE
-6  mmol/l
HCO3
18  mmol/l
Complete blood count
HGB
130  g/L
HTC
0,42
Biochemical analysis
Na
150  mmol/L
K
4,3  mmol/L
Cl
110  mmol/L
Glycaemia
Take a sample
Arterial blood gas
Take a sample
Complete blood count
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Biochemical analysis
Take a sample