The bloodshot appearance is due to the irritation and dilation of the surface blood vessel in the eye. Other symptoms can accompany the red appearance, like itching, soreness, discharge and even blurred vision. These symptoms could indicate a more serious problem.
The list of possible medications or substances mentioned in sources as possibe causes of Heart block includes: 1  Beta-adrenergic blockers. 2  Digitalis. 3  Flecainide. Flecatab. 4  Flumadine. Quinidine. 5  Rimantidine. Tambocor.
Atrioventricular Heart Block Heart block occurs when the electrical impulses that make the heart beat do not transmit normally. Normally, these impulses travel from the heart's upper chambers, called the atria, to the lower chambers, called the ventricles, through the atrioventricular (AV) node. In heart block, the AV node may be damaged from surgery, medications or congenital heart conditions. Heart block affects the heart's ability to pump blood and the body's blood pressure, and can cause an abnormally slow heart rhythm called bradycardia. An implanted artificial pacemaker can restore a normal heart rate and rhythm. Heart block may cause the following symptoms: Chest pressure or pain. Fainting, also known as syncope, or near-syncope. Fatigue. Lightheadedness or dizziness. Palpitations, which can be skipping, fluttering or pounding in the chest.