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Acute severe asthma, also known as status asthmaticus, is an acute exacerbation of asthma that does not respond to standard treatments of bronchodilators (inhalers) and corticosteroids. [2] Asthma is caused by multiple genes , some having protective effect, with each gene having its own tendency to be influenced by the environment although a ...
Cardiac asthma is the medical condition of intermittent wheezing, coughing, and shortness of breath that is associated with underlying congestive heart failure (CHF). [1] Symptoms of cardiac asthma are related to the heart's inability to effectively and efficiently pump blood in a CHF patient. [2]
Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. [1] In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. [1] Heart rates above the resting rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart).
min. fast heart rate, normal blood pressure: minimal II: 15–30% (0.75–1.5 L) fast heart rate, min. low blood pressure: intravenous fluids III: 30–40% (1.5–2 L) very fast heart rate, low blood pressure, confusion: fluids and packed RBCs IV >40% (>2 L) critical blood pressure and heart rate: aggressive interventions
Heart failure: Exercise intolerance is a primary symptom of chronic diastolic heart failure. [13] Cardiac arrhythmia; Aortic valve insufficiency; Pulmonary artery hypertension: PAH has the following symptoms; dyspnea and fatigue, these systems consequently contribute to exercise intolerance. [14]
The cause of this condition is not accurately known, though it is probably of nervous origin and can be aggravated by physical wear and tear. The symptoms are sometimes very alarming but it is not considered in itself dangerous.
While a fast heart rate caused by low blood pressure is more common, [18] a Bezold–Jarisch reflex has been described in 10% of people, where a slow heart rate is associated with low blood pressure. [10] A drop in blood pressure or shock (either distributive or cardiogenic) may cause the feeling of lightheadedness or loss of consciousness. [19]
Researchers have found that animals began to exhibit abnormal changes in blood flow after just one day of an artificially generated fast heart rate (designed to simulate a tachyarrythmia). [1] As their TIC progresses, these animals will have worsening heart function (e.g.: reduced cardiac output and reduced ejection fraction ) for 3–5 weeks ...