It could be dangerous. In your case, palpitation or flutter is due to anxiety and in anxiety induced flutter, anti-hypertensives do not work. To control that, you can try antidepressant like escitalopram or paroxetine. You can get your ECG done. It help to check heart rhythm. It is completely different form ECHO.
A CBC helps your doctor check any symptoms, such as weakness, fatigue, or bruising, you may have. A CBC also helps him or her diagnose conditions, such as anemia, infection, and many other disorders. A CBC test usually includes: 1  White blood cell (WBC, leukocyte) count.2  White blood cells protect the body against infection. 3  If an infection develops, white blood cells attack and destroy the bacteria, virus, or other organism causing it. 4  White blood cells are bigger than red blood cells but fewer in number. Platelet (thrombocyte) count. 2  Platelets (thrombocytes) are the smallest type of blood cell. 3  They are important in blood clotting. 4  When bleeding occurs, the platelets swell, clump together, and form a sticky plug that helps stop the bleeding.
Complete blood count (CBC). A CBC is used to count the number of blood cells in a sample of your blood. For anemia your doctor will be interested in the levels of the red blood cells contained in the blood (hematocrit) and the hemoglobin in your blood.