Search results
Results from the WOW.Com Content Network
Pulse pressure is considered low if it is less than 25% of the systolic. (For example, if the systolic pressure is 120 mmHg, then the pulse pressure would be considered low if it is less than 30 mmHg, since 30 is 25% of 120.) [91] A very low pulse pressure can be a symptom of disorders such as congestive heart failure. [52]
Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide. It is also modulated by numerous factors, including (but not limited to) genetics ...
Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular beating of the atrial chambers of the heart. [11][12] It often begins as short periods of abnormal beating, which become longer or continuous over time. [4] It may also start as other forms of arrhythmia such as atrial flutter ...
If your heart is racing at more than 130 beats per minute for more than 10 minutes, your heart rate is less than 50 beats per minute or if the heartbeat is fast and erratic, then seek immediate ...
A typical heart rate is 75 beats per minute (bpm), which means that the cardiac cycle that produces one heartbeat, lasts for less than one second. The cycle requires 0.3 sec in ventricular systole (contraction)—pumping blood to all body systems from the two ventricles; and 0.5 sec in diastole (dilation), re-filling the four chambers of the ...
Pulse pressure is the difference between systolic and diastolic blood pressure. [1] It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts. Healthy pulse pressure is around 40 mmHg. [1][2] A pulse pressure that is consistently 60 mmHg or greater is likely to be associated with ...
Major factors influencing cardiac output – heart rate and stroke volume, both of which are variable. [1]In cardiac physiology, cardiac output (CO), also known as heart output and often denoted by the symbols , ˙, or ˙, [2] is the volumetric flow rate of the heart's pumping output: that is, the volume of blood being pumped by a single ventricle of the heart, per unit time (usually measured ...
In people aged under 50 years, more men than women have hypertension, [10] and in ages above 50 years the prevalence of hypertension is the same in men and women. [10] In ages above 65 years, more women than men have hypertension. [7] Hypertension becomes more common with age. [5] Hypertension is common in high, medium, and low-income countries.