First-degree heart block is the mildest type and often requires no treatment. Third-degree heart block is the most severe and often needs a pacemaker to regulate the heartbeat. Many different causes ...

People with third degree heart block have an irregular heartbeat due to a total blockage of the electrical impulses that control the heart’s activity. It can lead to faintness and breathing difficulty ...

Third-degree heart block usually involves treatment with a temporary or permanent pacemaker. In some situations, treatment may include medications or synthetic hormones. Third-degree heart block, also ...