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What is high output heart failure?
What is the difference between input and output impedance?
What is high input impedance?
Why do op-amps have high input impedance?
For voltage amplification you want low output impedance from the previous stage and high input impedance from the next stage to maximize the voltage gain. For current amplification you want the reverse: high output impedance from the previous stage and low input impedance from the next stage.
- Output Impedance of Instrumentation Amplifier
That drive level is low enough to not upset the operating...
- Output Impedance of Instrumentation Amplifier
A tri-state output can either drive the output line high, drive it low, or enter "hi-Z state" (a.k.a., "high impedance state", a.k.a., "disabled", a.k.a., "tri-stated"). In high-Z state, the output pin effectively is disconnected.
Jun 22, 2013 · The short answer: input impedance is "high" (ideally infinite). Output impedance is "low" (ideally zero). But what does this mean, and why is that useful? Impedance is the relationship between voltage and current. It's a combination of resistance (frequency-independent, resistors) and reactance (frequency-dependant, inductors and capacitors).
Nov 19, 2023 · What Does High Output Mean On A Car? The term “High Output” on a car refers to an engine that has been engineered to produce significantly more power and torque than a standard engine. These engines are designed with high-performance characteristics, often featuring advanced technologies such as turbocharging, supercharging, and ...
- Overview
- What is high output heart failure?
- What is low output heart failure?
- Takeaway
High output and low output heart failure refer to how much blood your heart pumps to your body with each heartbeat. In both cases, the output is not enough to meet your body’s needs.
A diagnosis of heart failure means your heart cannot pump enough blood to meet your body’s needs. Usually, this results in a reduced amount of blood leaving the heart with every contraction. This is known as low output heart failure.
Conversely, high output heart failure means the heart pumps a greater amount than usual, but it is still not enough to meet the demands of the body’s organs, muscles, and other tissues.
Some symptoms of high output and low output heart failure are similar, but treatments can differ because the underlying causes of each condition may be very different.
Definition
Having high output heart failure means your heart pumps at least 8 liters per minute (L/min) or you have a cardiac index of 4.0 L/min/m2. Cardiac index is an assessment of how much blood is pumped out in relation to a person’s body surface area, which is represented as m2.
Symptoms
The main symptoms of high output heart failure include: •fatigue •reduced ability to exercise •heart palpitations •shortness of breath, especially when lying flat •swelling in the abdomen, lower limbs, or both •tachycardia, which is an abnormally fast heart rate
Causes and risk factors
Some main causes of high output heart failure are: •arteriovenous fistula, which is an abnormal connection between an artery and a vein •body mass index (BMI) of 30 or more •hyperthyroidism, which is an overactive thyroid •increased metabolism that requires greater-than-normal blood flow •rare forms of blood cancer •severe anemia
Definition
Normal cardiac output is about 5–6 L/min at rest. Low output heart failure means the heart consistently pumps out less than that amount while at rest.
Symptoms
Some of the more common symptoms of low output heart failure include: •confusion and difficulty concentrating, which are caused by reduced blood flow to the brain •fatigue •nausea and vomiting •abdominal pain •reduced ability to exercise •shortness of breath •swelling in the arms and legs
Causes and risk factors
Low output heart failure is typically a complication of: •cardiomyopathy, which is the enlargement or thickening of the heart muscle •coronary heart disease •heart attack •high blood pressure
Any type of heart failure is a cause for concern because it means the heart is not meeting the body’s need for consistent, robust circulation.
However, with ongoing research into ways to prevent or treat high output and low output heart failure, you and your doctor can often manage these cardiac conditions well enough to meet your needs for a good quality of life.
- James Roland
Aug 28, 2023 · A high input impedance is desirable as it minimizes the loading effect on the signal source, allowing for accurate and efficient signal transfer. Op-amps typically exhibit extremely high input impedance, often in the range of megaohms (MΩ) or gigaohms (GΩ).
High cardiac output sets high-output heart failure apart from the other types of heart failure. With most types of heart failure, cardiac output is normal or lower than normal. People with high-output heart failure have a cardiac output of 8 liters (about 2 gallons) of blood per minute.
