Sick sinus syndrome causes slow heartbeats, pauses (long periods between heartbeats) or irregular heartbeats (arrhythmias). Sick sinus syndrome is relatively uncommon. The risk of developing it increases with age. Many people with sick sinus syndrome eventually need an implanted device called a pacemaker to keep the heart in a regular rhythm.

Sinusitis is a condition that causes inflammation of the sinuses, which are air-filled spaces in the bones of the face. Nausea is a feeling of sickness in the stomach that can sometimes lead to vomiting. While sinusitis does not directly cause nausea, it can sometimes lead to nausea indirectly. Here are some ways that sinusitis can cause nausea: Postnasal drip: Sinusitis can cause postnasal drip, which is a flow of mucus from the back of the nose down the throat. This mucus can irritate the stomach and cause nausea. Dehydration: Sinusitis can cause dehydration, which can also lead to nausea. Pain: Sinusitis can cause pain in the face, head, and neck. This pain can be severe and can sometimes lead to nausea. Anxiety: Sinusitis can cause anxiety, which can also lead to nausea.

Your heart’s sinus node also may suddenly pause or stop (sinus pause or sinus arrest) for more than 2 to 3 seconds. Sick sinus syndrome is uncommon and is often found in people aged 50 and older, with increasing prevalence as people age. Most people don’t have symptoms, while some need an implanted pacemaker to restore their normal heart rhythm.

Normally, an electrical wave comes out of the sinus node and propagates through the rest of the heart, keeping the heart rate between 60 and 100 beats per minute (bpm). In sick sinus syndrome, the sinus node is not able to properly propagate its electrical wave. What are the symptoms of sick sinus syndrome?