1 Most cases of malaria and most of the deaths caused by malaria occur in Africa.  Although most cases of malaria are caused by Plasmodium falciparum or P. vivax, P. falciparum accounts for almost all of the deaths caused by malaria.
For Echocardiography, color Doppler frame rates should be kept 17 Hz or above and preferably in the 20-30 Hz range. Every ultrasound machine has a numeric display of the current frame rate, which can range from less than 10 Hz to more than 60 Hz. Above: Image data area with FPS (Frames Per Second) and other adjustments.
Teuf_. Follow. Your monitor basically draws a single picture to its screen at a set rate, which each one of these pictures being called a frame. Your refresh rate tells you how many times per second the monitor shows you a new image, so when you go from 60 Hz to 75 Hz you're getting 25% more images per second. More frames per second means the the video looks smoother, since its better at tricking your eyes into thinking its continuous.