Sick sinus syndrome - Wikipedia, the free encyclopedia
Sick sinus syndrome (SSS), also called sinus node dysfunction (SND), is a group of abnormal heart rhythms (arrhythmias) presumably caused by a malfunction .
http://en.wikipedia.org/wiki/Sick_sinus_syndrome

Further evidence for the site of reentry in so-called sinus node - NCBI
To provide further evidence for the participation of the sinus node in so-called sinus node reentry in man, right atrial stimulation and endocardial mapping were .
http://www.ncbi.nlm.nih.gov/pubmed/7363923

About Arrhythmia
Jul 18, 2012 . The heart beats (contracts) when an electrical impulse from the sinoatrial node ( also called the SA node or sinus node) moves through it.
http://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/About-Arrhythmia_UCM_002010_Article.jsp

The Heartbeat
Embedded in the wall of the right atrium is a mass of specialized heart tissue called the sino-atrial (S-A) node. The S-A node is also called the pacemaker .
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/H/Heart.html

Sinus venosus - Wikipedia, the free encyclopedia
The sinus venosus is a large quadrangular cavity which precedes the atrium on the . to form a smooth part called the sinus venarum, also known as the venarum sinus, . The sinus venosus also forms the SA node and the coronary sinus.
http://en.wikipedia.org/wiki/Sinus_venosus

Heart Rhythm Disorders
The SA node is sometimes called the "natural pacemaker" of the heart. Electrical impulses leave the SA node and travel through special conducting pathways in .
http://www.emedicinehealth.com/heart_rhythm_disorders/article_em.htm

The Heart's Electrical System - UCSF Benioff Children's Hospital
The electrical impulse starts on the right side of the upper chamber in an area called the sinus node. The sinus node is the normal pacemaker of the heart and .
http://www.ucsfbenioffchildrens.org/education/hearts_electrical_system/index.html

SA nodal blocks - Medical Dictionary - The Free Dictionary
(redirected from SA nodal blocks) . Failure of an impulse to leave the sinoatrial node. . Called also sinoatrial bundle, Keith's node, Keith-Flack node. Want to .
http://medical-dictionary.thefreedictionary.com/SA+nodal+blocks

sinus node - Medical Dictionary - The Free Dictionary
Definition of sinus node in the Medical Dictionary. sinus node .
http://medical-dictionary.thefreedictionary.com/sinus+node