Transient bradycardia

Oral verapamil - Oral verapamil may lead to first-degree AV block and transient bradycardia, sometimes accompanied by nodal escape rhythms. 

Vascular access Hemodynamic/arrhythmic Groin hematoma Femoral artey pseudoaneurysm Hypotension Transient bradycardia Retroperitoneal hemorrhage... 

In 24 patients with atrial fibrillation who underwent elective transvenous cardioversion for atrial fibrillation, flecainide reduced the energy requirements for further defibrillation after induction of atrial fibrillation by atrial pacing (27). There were no ventricular dysrhythmias, but transient bradycardia requiring ventricular pacing occurred in two patients. Two patients had transient asymptomatic hjrpotension after flecainide and one reported transient dizziness and some hght-headedness. 

Intravenous lidocaine has been used to treat severe chronic daily headache in 19 patients (three men, median age 37 years) (9). There were adverse effects during four infusions of lidocaine hyperkalemia (6.4 mmol/1), which did not resolve after withdrawal of lidocaine transient hypotension (75/50 mmHg), which was attributed to concomitant droperidol an unspecified abnormality of cardiac rhythm and on another occasion a transient bradycardia and chest pain with a normal electrocardiogram, fever, and intractable nausea. The study was neither randomized nor placebo-controlled, and in no case was the adverse event strongly associated with the administration of lidocaine. 

Observational studies When remifentanil was given by intravenous infusion pump at a rate of 0.1-0.15 micrograms/kg/minute to 186 patients undergoing percutaneous transhepatic biliary drainage (mean total dose 116 micrograms), 10% had transient bradycardia and 2% had respiratory depression [160 ]. 

In late gestation, the fetal cardiovascular response to hypoxia is typified by a rapid, transient bradycardia and increased heart rate variability (21,22). The bradycardia reaches a nadir approximately 1-2 min after the onset of the hypoxic insult (15,23) and, presumably, economizes on myocardial oxygen consumption. Fetal hypoxic bradycardia occurs at the onset of hypoxic hypoxia (5), umbilical cord occlusion (24,25), and uterine artery occlusion (26)— the three most common experimental hypoxic challenges. 

The intravenous injection of 1 mg glucagon increases the pulse rate in every case. Mean pulse fre quency is increased of 14-18 beats per min the maximum increase is reached at the 2d min. After 5 min, the pulse rate is normalised. This effect is similar in normal and hypertensive patients. In one of the 2 cases of pheochromocytoma, a slight and transient bradycardia has, on the contrary, been observed. 

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