Back to ECG cases%22%2F%3E%3Cpath%20d%3D%22M%2040%200%20L%200%200%200%2040%22%20fill%3D%22none%22%20stroke%3D%22%23d99b95%22%20stroke-width%3D%221%22%2F%3E%3C%2Fpattern%3E%0A%20%20%3C%2Fdefs%3E%3Crect%20width%3D%221200%22%20height%3D%22780%22%20fill%3D%22url(%23major)%22%2F%3E%3Ctext%20x%3D%2248%22%20y%3D%2258%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EI%3C%2Ftext%3E%3Cpath%20d%3D%22M%2050%20115%20L%2060%20115%20L%2060%2075%20L%2070%2075%20L%2070%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%2070%20115%20L%2085.2%20115%20Q%2090.5%20111.8%2095.7%20115.0%20L%20112.4%20115.0%20L%20122.4%2087.0%20L%20131.2%20131.0%20L%20137.5%20115.0%20L%20154.0%20115.0%20Q%20156.3%20108.6%20163.4%20107.0%20Q%20172.9%20111.0%20182.5%20115.0%20L%20189.8%20115%20Q%20195.0%20111.8%20200.2%20115.0%20L%20217.0%20115.0%20L%20227.0%2087.0%20L%20235.8%20131.0%20L%20242.0%20115.0%20L%20258.5%20115.0%20Q%20260.9%20108.6%20267.9%20107.0%20Q%20277.5%20111.0%20287.0%20115.0%20L%20312%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22340%22%20y%3D%2258%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EaVR%3C%2Ftext%3E%3Cpath%20d%3D%22M%20342%20115%20L%20352%20115%20L%20352%2075%20L%20362%2075%20L%20362%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20362%20115%20L%20377.2%20115%20Q%20382.5%20111.8%20387.7%20115.0%20L%20404.4%20115.0%20L%20414.4%20109.0%20L%20423.2%20139.0%20L%20429.5%20115.0%20L%20446.0%20115.0%20Q%20448.3%20119.8%20455.4%20121.0%20Q%20464.9%20118.0%20474.5%20115.0%20L%20481.8%20115%20Q%20487.0%20111.8%20492.2%20115.0%20L%20509.0%20115.0%20L%20519.0%20109.0%20L%20527.8%20139.0%20L%20534.0%20115.0%20L%20550.5%20115.0%20Q%20552.9%20119.8%20559.9%20121.0%20Q%20569.5%20118.0%20579.0%20115.0%20L%20604%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22632%22%20y%3D%2258%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV1%3C%2Ftext%3E%3Cpath%20d%3D%22M%20634%20115%20L%20644%20115%20L%20644%2075%20L%20654%2075%20L%20654%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20654%20115%20L%20669.2%20115%20Q%20674.5%20111.8%20679.7%20115.0%20L%20696.4%20115.0%20L%20708.1%20103.0%20L%20718.4%20127.0%20L%20722.8%2075.0%20L%20725.7%20115.0%20L%20740.7%20115.0%20Q%20742.8%20124.6%20749.3%20127.0%20Q%20757.9%20121.0%20766.5%20115.0%20L%20773.8%20115%20Q%20779.0%20111.8%20784.2%20115.0%20L%20801.0%20115.0%20L%20812.7%20103.0%20L%20822.9%20127.0%20L%20827.3%2075.0%20L%20830.2%20115.0%20L%20845.2%20115.0%20Q%20847.4%20124.6%20853.8%20127.0%20Q%20862.4%20121.0%20871.0%20115.0%20L%20896%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22924%22%20y%3D%2258%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV4%3C%2Ftext%3E%3Cpath%20d%3D%22M%20926%20115%20L%20936%20115%20L%20936%2075%20L%20946%2075%20L%20946%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20946%20115%20L%20961.2%20115%20Q%20966.5%20111.8%20971.7%20115.0%20L%20988.4%20115.0%20L%20998.4%2079.0%20L%201007.2%20131.0%20L%201013.5%20115.0%20L%201030.0%20115.0%20Q%201032.3%20108.6%201039.4%20107.0%20Q%201048.9%20111.0%201058.5%20115.0%20L%201065.8%20115%20Q%201071.0%20111.8%201076.2%20115.0%20L%201093.0%20115.0%20L%201103.0%2079.0%20L%201111.8%20131.0%20L%201118.0%20115.0%20L%201134.5%20115.0%20Q%201136.9%20108.6%201143.9%20107.0%20Q%201153.5%20111.0%201163.0%20115.0%20L%201188%20115%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%2248%22%20y%3D%22220%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EII%3C%2Ftext%3E%3Cpath%20d%3D%22M%2050%20277%20L%2060%20277%20L%2060%20237%20L%2070%20237%20L%2070%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%2070%20277%20L%2085.2%20277%20Q%2090.5%20273.8%2095.7%20277.0%20L%20112.4%20277.0%20L%20122.4%20241.0%20L%20131.2%20287.0%20L%20137.5%20277.0%20L%20154.0%20277.0%20Q%20156.3%20270.6%20163.4%20269.0%20Q%20172.9%20273.0%20182.5%20277.0%20L%20189.8%20277%20Q%20195.0%20273.8%20200.2%20277.0%20L%20217.0%20277.0%20L%20227.0%20241.0%20L%20235.8%20287.0%20L%20242.0%20277.0%20L%20258.5%20277.0%20Q%20260.9%20270.6%20267.9%20269.0%20Q%20277.5%20273.0%20287.0%20277.0%20L%20312%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22340%22%20y%3D%22220%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EaVL%3C%2Ftext%3E%3Cpath%20d%3D%22M%20342%20277%20L%20352%20277%20L%20352%20237%20L%20362%20237%20L%20362%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20362%20277%20L%20377.2%20277%20Q%20382.5%20273.8%20387.7%20277.0%20L%20404.4%20277.0%20L%20414.4%20257.0%20L%20423.2%20291.0%20L%20429.5%20277.0%20L%20446.0%20277.0%20Q%20448.3%20272.2%20455.4%20271.0%20Q%20464.9%20274.0%20474.5%20277.0%20L%20481.8%20277%20Q%20487.0%20273.8%20492.2%20277.0%20L%20509.0%20277.0%20L%20519.0%20257.0%20L%20527.8%20291.0%20L%20534.0%20277.0%20L%20550.5%20277.0%20Q%20552.9%20272.2%20559.9%20271.0%20Q%20569.5%20274.0%20579.0%20277.0%20L%20604%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22632%22%20y%3D%22220%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV2%3C%2Ftext%3E%3Cpath%20d%3D%22M%20634%20277%20L%20644%20277%20L%20644%20237%20L%20654%20237%20L%20654%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20654%20277%20L%20669.2%20277%20Q%20674.5%20273.8%20679.7%20277.0%20L%20696.4%20277.0%20L%20708.1%20261.0%20L%20718.4%20293.0%20L%20722.8%20245.0%20L%20725.7%20277.0%20L%20740.7%20277.0%20Q%20742.8%20285.0%20749.3%20287.0%20Q%20757.9%20282.0%20766.5%20277.0%20L%20773.8%20277%20Q%20779.0%20273.8%20784.2%20277.0%20L%20801.0%20277.0%20L%20812.7%20261.0%20L%20822.9%20293.0%20L%20827.3%20245.0%20L%20830.2%20277.0%20L%20845.2%20277.0%20Q%20847.4%20285.0%20853.8%20287.0%20Q%20862.4%20282.0%20871.0%20277.0%20L%20896%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22924%22%20y%3D%22220%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV5%3C%2Ftext%3E%3Cpath%20d%3D%22M%20926%20277%20L%20936%20277%20L%20936%20237%20L%20946%20237%20L%20946%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20946%20277%20L%20961.2%20277%20Q%20966.5%20273.8%20971.7%20277.0%20L%20988.4%20277.0%20L%20998.4%20237.0%20L%201007.2%20291.0%20L%201013.5%20277.0%20L%201030.0%20277.0%20Q%201032.3%20270.6%201039.4%20269.0%20Q%201048.9%20273.0%201058.5%20277.0%20L%201065.8%20277%20Q%201071.0%20273.8%201076.2%20277.0%20L%201093.0%20277.0%20L%201103.0%20237.0%20L%201111.8%20291.0%20L%201118.0%20277.0%20L%201134.5%20277.0%20Q%201136.9%20270.6%201143.9%20269.0%20Q%201153.5%20273.0%201163.0%20277.0%20L%201188%20277%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%2248%22%20y%3D%22382%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EIII%3C%2Ftext%3E%3Cpath%20d%3D%22M%2050%20439%20L%2060%20439%20L%2060%20399%20L%2070%20399%20L%2070%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%2070%20439%20L%2085.2%20439%20Q%2090.5%20435.8%2095.7%20439.0%20L%20112.4%20439.0%20L%20122.4%20415.0%20L%20131.2%20451.0%20L%20137.5%20439.0%20L%20154.0%20439.0%20Q%20156.3%20434.2%20163.4%20433.0%20Q%20172.9%20436.0%20182.5%20439.0%20L%20189.8%20439%20Q%20195.0%20435.8%20200.2%20439.0%20L%20217.0%20439.0%20L%20227.0%20415.0%20L%20235.8%20451.0%20L%20242.0%20439.0%20L%20258.5%20439.0%20Q%20260.9%20434.2%20267.9%20433.0%20Q%20277.5%20436.0%20287.0%20439.0%20L%20312%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22340%22%20y%3D%22382%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EaVF%3C%2Ftext%3E%3Cpath%20d%3D%22M%20342%20439%20L%20352%20439%20L%20352%20399%20L%20362%20399%20L%20362%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20362%20439%20L%20377.2%20439%20Q%20382.5%20435.8%20387.7%20439.0%20L%20404.4%20439.0%20L%20414.4%20411.0%20L%20423.2%20449.0%20L%20429.5%20439.0%20L%20446.0%20439.0%20Q%20448.3%20434.2%20455.4%20433.0%20Q%20464.9%20436.0%20474.5%20439.0%20L%20481.8%20439%20Q%20487.0%20435.8%20492.2%20439.0%20L%20509.0%20439.0%20L%20519.0%20411.0%20L%20527.8%20449.0%20L%20534.0%20439.0%20L%20550.5%20439.0%20Q%20552.9%20434.2%20559.9%20433.0%20Q%20569.5%20436.0%20579.0%20439.0%20L%20604%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22632%22%20y%3D%22382%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV3%3C%2Ftext%3E%3Cpath%20d%3D%22M%20634%20439%20L%20644%20439%20L%20644%20399%20L%20654%20399%20L%20654%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20654%20439%20L%20669.2%20439%20Q%20674.5%20435.8%20679.7%20439.0%20L%20696.4%20439.0%20L%20707.3%20419.0%20L%20716.8%20459.0%20L%20720.9%20423.0%20L%20723.6%20439.0%20L%20739.3%20439.0%20Q%20741.6%20445.4%20748.3%20447.0%20Q%20757.4%20443.0%20766.5%20439.0%20L%20773.8%20439%20Q%20779.0%20435.8%20784.2%20439.0%20L%20801.0%20439.0%20L%20811.8%20419.0%20L%20821.3%20459.0%20L%20825.4%20423.0%20L%20828.1%20439.0%20L%20843.9%20439.0%20Q%20846.1%20445.4%20852.9%20447.0%20Q%20861.9%20443.0%20871.0%20439.0%20L%20896%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%22924%22%20y%3D%22382%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EV6%3C%2Ftext%3E%3Cpath%20d%3D%22M%20926%20439%20L%20936%20439%20L%20936%20399%20L%20946%20399%20L%20946%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%20946%20439%20L%20961.2%20439%20Q%20966.5%20435.8%20971.7%20439.0%20L%20988.4%20439.0%20L%20998.4%20403.0%20L%201007.2%20455.0%20L%201013.5%20439.0%20L%201030.0%20439.0%20Q%201032.3%20432.6%201039.4%20431.0%20Q%201048.9%20435.0%201058.5%20439.0%20L%201065.8%20439%20Q%201071.0%20435.8%201076.2%20439.0%20L%201093.0%20439.0%20L%201103.0%20403.0%20L%201111.8%20455.0%20L%201118.0%20439.0%20L%201134.5%20439.0%20Q%201136.9%20432.6%201143.9%20431.0%20Q%201153.5%20435.0%201163.0%20439.0%20L%201188%20439%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%2248%22%20y%3D%22556%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22bold%22%20fill%3D%22%230a0a0a%22%3EII%3C%2Ftext%3E%3Cpath%20d%3D%22M%2050%20616%20L%2060%20616%20L%2060%20576%20L%2070%20576%20L%2070%20616%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.4%22%2F%3E%3Cpath%20d%3D%22M%2070%20616%20L%2090.9%20616%20Q%20101.8%20612.8%20112.7%20616.0%20L%20147.6%20616.0%20L%20168.5%20580.0%20L%20186.8%20626.0%20L%20199.9%20616.0%20L%20234.2%20616.0%20Q%20239.1%20609.6%20253.9%20608.0%20Q%20273.7%20612.0%20293.6%20616.0%20L%20308.9%20616%20Q%20319.8%20612.8%20330.7%20616.0%20L%20365.6%20616.0%20L%20386.5%20580.0%20L%20404.8%20626.0%20L%20417.9%20616.0%20L%20452.2%20616.0%20Q%20457.1%20609.6%20471.9%20608.0%20Q%20491.7%20612.0%20511.6%20616.0%20L%20526.9%20616%20Q%20537.8%20612.8%20548.7%20616.0%20L%20583.6%20616.0%20L%20604.5%20580.0%20L%20622.8%20626.0%20L%20635.9%20616.0%20L%20670.2%20616.0%20Q%20675.1%20609.6%20689.9%20608.0%20Q%20709.7%20612.0%20729.6%20616.0%20L%20744.9%20616%20Q%20755.8%20612.8%20766.7%20616.0%20L%20801.6%20616.0%20L%20822.5%20580.0%20L%20840.8%20626.0%20L%20853.9%20616.0%20L%20888.2%20616.0%20Q%20893.1%20609.6%20907.9%20608.0%20Q%20927.7%20612.0%20947.6%20616.0%20L%20962.9%20616%20Q%20973.8%20612.8%20984.7%20616.0%20L%201019.6%20616.0%20L%201040.5%20580.0%20L%201058.8%20626.0%20L%201071.9%20616.0%20L%201106.2%20616.0%20Q%201111.1%20609.6%201125.9%20608.0%20Q%201145.7%20612.0%201165.6%20616.0%20L%201180.0%20616.0%22%20fill%3D%22none%22%20stroke%3D%22%230a0a0a%22%20stroke-width%3D%221.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Ctext%20x%3D%2240%22%20y%3D%22768%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2210%22%20fill%3D%22%23666%22%3E25%20mm%2Fs%20%20%2010%20mm%2FmV%3C%2Ftext%3E%3Ctext%20x%3D%221160%22%20y%3D%22768%22%20font-family%3D%22Arial%2C%20sans-serif%22%20font-size%3D%2210%22%20fill%3D%22%23666%22%20text-anchor%3D%22end%22%3ERight%20Bundle%20Branch%20Block%3C%2Ftext%3E%3C%2Fsvg%3E)
beginnerRight Bundle Branch Block
Right Bundle Branch Block
Clinical vignette
65 y/o female, dyspnea on exertion. Screening ECG.
Study the tracing first. Formulate your interpretation, then reveal the findings below to check yourself.