severe bradycardia following spinal anesthesia

prevalence of Severe and life-threatening bradycardia following spinal anesthesia is about 2.5 percent and in most cases is associated with a high level of anesthesia (high spinal block). Numbness levels higher that T4 are considered to be a risk factor for occurrence of severe bradycardia and even cardiac arrest.
History of the patient: A 81-year-old male patient referred to the Peymanieh hospital in Jahrom to have a surgery due to Ayngvaynal hernia and hydrocele. In the anesthesia consultation before surgery, the patient's heart had a sinus rhythm without ECG signs of ischemia, hypertrophy and heart block. 13 minutes after performing spinal, all vital signs were normal and acceptable and incision has not done yet that And without evidence of symptoms of high spinal block observed¡ the patient's heart rate suddenly dropped to about bpm45. Moments later it was reduced to about bpm22 but Fortunately with injection of atropine and ephedrine heartbeat was normal.
The incidence of severe and life-threatening bradycardia is not necessarily associated with high spinal block even in the presence of normal spinal block is predictable and This fact highlights the importance of careful and real-time patient monitoring. Keywords: spinal anesthesia, bradycardia, inguinal hernia and hydrocele.