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These are normal symptoms: Faster heart rate and breathing; shivering; cold ... Parents worry that a high fever will cause seizures or brain damage. A ... May 6, 2011 ... Almost always, there is a medical reason that the sinus node keeps signaling for the faster rate. Possibilities include anemia, an underlying infection, ... ... symptoms, such as worsening shortness of breath, chest pain, increased heart rate, or shakiness. Do not use other medicines that contain a LABA or an ... Active heart rate: This is how fast your heart beats when you're active or exercising. ... If you're worried about an increased heart rate causing other health ... After adjustment for other risk factors, only two studies for all-cause mortality and four studies for cardiovascular mortality reported an absence of ... Jun 14, 2019 ... There are times that having an elevated heart rate makes sense. For instance, if you are fighting a fever or getting over the flu, or are in the ... Sep 24, 2024 ... Causes of ventricular tachycardia · Lack of coronary artery blood flow, depriving oxygen to heart tissue · Cardiomyopathy distorting the heart's ... In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. ... Heart rates above the resting rate may be normal (such as ... May 29, 2017 ... Beating too quickly ... Overactive thyroid, also known as hyperthyroidism, can throw off the heart's normal rhythm, causing palpitations. Nov 7, 2024 ... 1. Stress and Anxiety: The most common cause of a fast heartbeat is stress or anxiety. · 2. Caffeine and Stimulants: · 3. Dehydration: · 4. Heart ...