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.
Ultrasound uses high-frequency sound waves to produce an image on a screen of the baby in the mother's uterus. The scans are typically done twice during pregnancy, but the one done between 18 and 22 weeks is when the sonographer (ultrasound technician) might identify the gender of the baby, if parents want to know.