Hiccups have been associated with bradycardia (slowed heart rhythms) due to atrioventricular node dysfunction, but they are regarded as symptoms of AV node dysfunction rather than the cause.

The atrioventricular node (AVN) has mystified generations of investigators over the last century and continues today to be at the epicenter of debates among anatomists, experimentalists ...

In order to cause SA node dysfunction, the occlusion in the RCA must be very proximal, as the SA nodal artery is one of the first branches of the RCA. The AV nodal artery, however, is more distal ...

Thus, one could suggest that if the block at the AV-nodal site is reversible ... min or slower if cardiomegaly or left ventricular dysfunction is present. [11] However, prognosis and natural ...

On occasion, the sinus rate can be different rom the ventricular rate ― known as AV dissociation ... and is a form of autonomic dysfunction. Sinus node modification or ablation procedures ...

Ischemic heart or peripheral vascular disease. 1 st-degree AV block. Sinus node dysfunction. Conduction disorders (eg, Wolff-Parkinson-White). Monitor HR during therapy. Bronchospastic disease.