1·Dizziness. Heart attacks can cause lightheadedness and loss of consciousness. So can potentially dangerous heart rhythm abnormalities known as arrhythmias.
眩晕。心脏病发作可导致头晕，意识丧失。因此能潜在威胁的心律异常被称为心律失常。
2·Hyperventilation brings on many sensations such as lightheadedness and tightness of the chest that occur during a panic attack.
深度呼吸能产生许多感受，例如：在一次惊恐袭击中的头晕、胸紧。
3·When blood pressure drops suddenly, the brain is deprived of an adequate blood supply which can lead to dizziness or lightheadedness.
当血压突然下降时，大脑无法获得足够血供，从而导致眩晕或头晕眼花。