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2. Palpitations - Wikipedia

   en.wikipedia.org/wiki/Palpitations

   The rhythm of the palpitations may indicate the etiology of the palpitations (irregular palpitations indicate atrial fibrillation as a source of the palpitations). [1] An irregular pounding sensation in the neck can be caused by the dissociation of mitral valve and tricuspid valve , and the subsequent atria are contracting against a closed ...

3. Postural orthostatic tachycardia syndrome - Wikipedia

   en.wikipedia.org/wiki/Postural_orthostatic...

   Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon sitting up or standing. [1] POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms, [10] including lightheadedness, brain fog, blurred vision, weakness, fatigue, headaches, heart palpitations, exercise intolerance, nausea ...

4. When Should You See a Doctor About Heart Palpitations ... - AOL

   www.aol.com/lifestyle/see-doctor-heart...

   The feeling of your heart pounding or racing is known as heart palpitations. Typically, heart palpitations are not anything to worry about, but there are times when you should see a doctor about them.

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

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

   High heart rates with associated symptoms such as chest tightness, palpitations or heart pounding/racing, fainting, dizziness, lightheadedness, shortness of breath, or fatigue, it may suggest an ...

6. Heyde's syndrome - Wikipedia

   en.wikipedia.org/wiki/Heyde's_syndrome

   Heyde's syndrome; A stenotic aortic valve: Specialty: Cardiology, general surgery, Hematology: Symptoms: Aortic valve stenosis symptoms: Chest pain (angina) or tightness Shortness of breath, especially during exertion or when lying down Fatigue or weakness Irregular heartbeat or heart palpitations Dizziness or fainting episodes Gastrointestinal bleeding symptoms: Occult (hidden) or overt ...

7. Paroxysmal nocturnal dyspnoea - Wikipedia

   en.wikipedia.org/wiki/Paroxysmal_nocturnal_dyspnoea

   In congestive heart failure, left ventricular dysfunction will also increase pulmonary congestion, so further congestion caused by the redistribution of blood volume upon laying down will worsen any dyspnea. [5] Other theories exist for why PND occurs, especially in those where PND only occurs while sleeping.