A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | V | W | Z
| Ventilator | A mechanical device for artificial ventilation of the lungs |
| Vertex Sharp Wave | Sharp negative wave usually seen in later portion of Sleep Stage I |
| Viral Pneumonia ( ) | An inflammation and infection caused by a virus |
| Vital Capacity (VC) | The total amount of air that can be exhaled after a maximum inspiration; The sum of the inspiratory reserve volume, the tidal volume, and the expiratory reserve volume |
| Volume | Space occupied by matter measured in milliliters or liters |