Coronary arteries examination by transthoracic echocardiography for a patient suffers a chest tightness and back pain, in Aden-Yemen Nashwan Saleh Mohammed Al-ashwal Al-Nasr general hospital and Al-ashwal clinic for medical & cardiac diseases || Adhala || Yemen [button url=”https://doi.org/10.26389/AJSRP.N080219″ target=”blank” style=”glass” background=”#f19409″ color=”#ffffff” size=”5″ center=”yes” radius=”round” icon=”icon: dot-circle-o”]DOI[/button] [spacer size=”10″] [button url=”https://journals.ajsrp.com/index.php/jmps/article/view/946/895″ target=”blank” style=”glass” background=”#0986f1″