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2. Cardiac contractility modulation - Wikipedia

   en.wikipedia.org/wiki/Cardiac_contractility...

   The FDA approved the OPTIMIZER Smart System, which delivers cardiac contractility modulation therapy, as indicated to improve 6-minute hall walk distance, quality of life, and functional status of NYHA Class III heart failure patients who remain symptomatic despite guideline directed medical therapy, who are in normal sinus rhythm, are not indicated for cardiac resynchronization therapy, and ...

3. Tricuspid regurgitation - Wikipedia

   en.wikipedia.org/wiki/Tricuspid_regurgitation

   The symptoms of TR depend on its severity. Severe TR causes right-sided heart failure, with the development of ascites and peripheral edema. [1] In severe cases of right heart failure due to TR, venous congestion of the kidneys and liver may lead to cardiorenal syndrome (kidney failure secondary to heart failure) and cardiohepatic syndromes (liver failure secondary to heart failure ...

4. Impedance cardiography - Wikipedia

   en.wikipedia.org/wiki/Impedance_cardiography

   Impedance cardiography (ICG) is a non-invasive technology measuring total electrical conductivity of the thorax and its changes in time to process continuously a number of cardiodynamic parameters, such as stroke volume (SV), heart rate (HR), cardiac output (CO), ventricular ejection time (VET), pre-ejection period and used to detect the impedance changes caused by a high-frequency, low ...

5. Afterdepolarization - Wikipedia

   en.wikipedia.org/wiki/Afterdepolarization

   Afterdepolarization is commonly a consequence of myocardial infarction, cardiac hypertrophy, or heart failure. [1] It may also result from congenital mutations associated with calcium channels and sequestration. [2]

6. Heart failure - Wikipedia

   en.wikipedia.org/wiki/Heart_failure

   Heart failure (HF), also known as congestive heart failure (CHF), is a syndrome caused by an impairment in the heart's ability to fill with and pump blood. Although symptoms vary based on which side of the heart is affected, HF typically presents with shortness of breath, excessive fatigue, and bilateral leg swelling. [3]

7. Electrical alternans - Wikipedia

   en.wikipedia.org/wiki/Electrical_alternans

   Electrical alternans is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats and a possible wandering base-line. It can be seen in cardiac tamponade and severe pericardial effusion and is thought to be related to changes in the ventricular electrical axis due to fluid in the pericardium, as the heart essentially wobbles in the fluid filled ...