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2. Brugada syndrome - Wikipedia

   en.wikipedia.org/wiki/Brugada_syndrome

   Brugada syndrome (BrS) is a genetic disorder in which the electrical activity of the heart is abnormal due to channelopathy. [2] It increases the risk of abnormal heart rhythms and sudden cardiac death. [2] Those affected may have episodes of syncope. [2] The abnormal heart rhythms seen in those with Brugada syndrome often occur at rest.

3. Sinus node dysfunction - Wikipedia

   en.wikipedia.org/wiki/Sinus_node_dysfunction

   Often sinus node dysfunction produces no symptoms, especially early in the disease course. Signs and symptoms usually appear in more advanced disease and more than 50% of patients will present with syncope or transient near-fainting spells as well as bradycardias that are accompanied by rapid heart rhythms, referred to as tachycardia-bradycardia syndrome [4] [5] Other presenting signs or ...

4. Arrhythmia - Wikipedia

   en.wikipedia.org/wiki/Arrhythmia

   Rhythms produced by an ectopic focus in the atria, or by the atrioventricular node, are the least dangerous dysrhythmias; but they can still produce a decrease in the heart's pumping efficiency because the signal reaches the various parts of the heart muscle with different timing than usual and can be responsible for poorly coordinated contraction.

5. What’s the Difference Between a Normal and Dangerous Heart Rate?

   www.aol.com/difference-between-normal-dangerous...

   With the exception of being a well-trained athlete or being asleep, a sustained heart rate less than 45 or greater than 110 may indicate a heart rhythm issue that is worth getting checked out ...

6. I'm a heart surgeon and heart attack survivor. These are 6 ...

   www.aol.com/im-heart-surgeon-heart-attack...

   These symptoms can also be associated with coronary heart disease or abnormal heart rhythms and are a red flag that should be evaluated, he notes. Inability to lie flat and breathe comfortably ...

7. 9 Weird Symptoms Cardiologists Say You Should Never Ignore

   www.aol.com/lifestyle/9-weird-symptoms...

   There’s good reason to pay attention to even the most understated symptoms: “Your heart is the lifeline of your whole body,” Ramlawi says. ... have a heart rhythm disorder like atrial ...

8. Long QT syndrome - Wikipedia

   en.wikipedia.org/wiki/Long_QT_syndrome

   The various forms of long QT syndrome, both congenital and acquired, produce abnormal heart rhythms (arrhythmias) by influencing the electrical signals used to coordinate individual heart cells. The common theme is a prolongation of the cardiac action potential – the characteristic pattern of voltage changes across the cell membrane that ...

9. What You Need to Know About Abnormal Heart Rhythm - AOL

   www.aol.com/lifestyle/know-abnormal-heart-rhythm...

   An abnormal heart rhythm, also called an arrhythmia, is when your heart beats too fast, too slow, or irregularly. Here’s everything you need to know. ... An abnormal heart rhythm, also called an ...