Mitral A Wave Unit Converter
Convert between cm/s, m/s
Also known as: Mitral A Velocity, Peak A Wave, Late Diastolic Mitral Inflow Velocity, A Wave Velocity
Convert Mitral A Wave
What is Mitral A Wave?
The mitral A-wave is a measurement from a heart ultrasound (echocardiogram) that captures the speed of blood flowing from the left atrium into the left ventricle during late diastole, when the atrium actively contracts.
The "A" stands for atrial contraction. This final push of blood accounts for roughly 15–20% of the total volume that fills the ventricle each heartbeat. Normal peak A-wave velocity is approximately 0.2–0.4 m/s in healthy adults.
It is interpreted alongside the mitral E-wave (early passive filling) as part of the E/A ratio, one of the core measures used to evaluate how well the heart relaxes and fills between beats.
Where Does Mitral A Wave Come From?
The A-wave originates from the contraction of the left atrium during late diastole. As the atrial muscle squeezes, it pushes the remaining blood across the open mitral valve into the left ventricle just before it contracts.
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