A case of transient left bundle branch block after a cervical wound.

Dear Editor,

We present a case of an 85-year-old male demonstrating transient left bundle branch block (LBBB) after the progression of anemia (15.2-11.8 g/dL) due to a neck wound in response to low-level steady-state exercise [Figure 1]. The troponin T and cardiac echo data did not show any significant findings for acute myocardial infarction. As he did not permit further examinations for his heart, he was discharged on foot. The patients with LBBB tend to be complicated with cardiovascular events, such as acute coronary syndrome, lethal arrhythmia, heart failure, or sudden death.[1] The mechanism underlying the occurrence of the transient LBBB might have involved misery perfusion due to both an increasing demand for oxygen induced by even mild exercise and a decreased delivery of oxygen due to the anemia,[23] based on the existence of chronic asymptomatic ischemia of the left bundle branch in our patient.

Figure 1

An electrocardiogram (ECG) on the 2nd hospital day. The ECG demonstrates transient left bundle branch block in response to low-level steady-state exercise